Answer:
55 inches
Step-by-step explanation:
This question is on z-score for a sample
The general formula for finding z score for a sample is;
z=(x-μ)/δ...................where x is the sample is the height , μ is the mean and δ is the standard deviation
Given;
z=3 x=? μ=49 δ=2
Substitute values above in the general formulae
z=(x-μ)/δ
3=(x-49)/2
[tex]3=\frac{x-49}{2} \\\\\\3*2=x-49\\\\\\6=x-49\\\\\\6+49=x\\\\\\55=x[/tex]
Answer:
The student is 55 inches tall.Step-by-step explanation:
To solve this problem we need to use the following formula
[tex]Z=\frac{x- \mu}{\sigma}[/tex]
Where [tex]Z[/tex] is the z-value, [tex]\mu[/tex] is the mean, [tex]\sigma[/tex] is the standard deviation and [tex]x[/tex] is the height of the student.
In this case, we have
[tex]Z=3\\\mu=49\\\sigma=2[/tex]
Replacing all these values, we have
[tex]3=\frac{x- 49}{2}\\6=x-49\\x=6+49\\x=55[/tex]
Therefore, the student is 55 inches tall.
Which of the following expressions is equal to x^2+25
[tex]\bf \textit{recall that }i^2=-1 \\\\[-0.35em] ~\dotfill\\\\ x^2+25\implies x^2+5^2\implies x^2-(-5^2)\implies x^2-(-1\cdot 5^2)\implies x^2-(i^2\cdot 5^2) \\\\\\ \stackrel{\textit{difference of squares}}{x^2-(5i)^2}\implies (x-5i)(x+5i)[/tex]
Answer:
The correct option is A.
Step-by-step explanation:
The given expression is
[tex]x^2+25[/tex]
[tex]x^2+5^2[/tex]
[tex]x^2-(-5^2)[/tex]
We know that [tex]i^2=-1[/tex].
Using this value the given expression can be written as
[tex]x^2-(i^25^2)[/tex]
[tex]x^2-(5i)^2)[/tex] [tex][\because a^mb^m=(ab)^m][/tex]
[tex](x-5i)(x+5i)[/tex] [tex][\because a^2-b^2=(a-b)(a+b)][/tex]
The given expression is equal to the expression (x-5i)(x+5i).
Therefore the correct option is A.
Write an explicit rule to represent the sequence:
Write an explict ride to represent the sequence
20, 24, 28, 32, 36,...
[tex]a_n=4n+16[/tex]
Answer:
+4
Step-by-step explanation:
36-4=32
32-4=28
28-4=24
24-4=20
20+4=24
24+4=28
28+4=32
32+4=36
Urgent!!!!!!!!!!
Given that AB/DE = BC/EF = 1/2, complete the statements to show that △ABC ~ △DEF by the SAS similarity theorem.
1st box: congruent, parallel, or perpendicular
2nd box: A and D, B and E, or C and F
3rd box: congruent, supplementary, or vertical
Answer:
1st box ⇒ perpendicular
2nd box ⇒ B and E
3rd box ⇒ congruent
Step-by-step explanation:
* Lets revise the case SAS of similarity
- SAS similarity : In two triangles, if two sets of corresponding sides
are proportional and the included angles are equal then the two
triangles are similar.
- Example : In triangle ABC and DEF, if m∠A = m∠D and
AB/DE = AC/DF then the two triangles are similar by SAS
* Lets solve the problem
- In Δ ABC and Δ DEF
∵ AB/DE = BC/EF = 1/2
- That means two sets of corresponding sides are proportion
∵ AB is a vertical side and BC is a horizontal side
∵ DE is a vertical side and EF is a horizontal side
∵ Horizontal and vertical lines are perpendicular
∴ AB ⊥ BC and DE ⊥ EF
- So angles B and E are right angles by definition of perpendicular
lines
∵ All right angles are congruent
∴ m∠B = m∠D
∵ The two triangles have two sets of corresponding sides are
proportion and the included angles are equal then the two
triangles are similar
∴ △ABC ~ △DEF by the SAS similarity theorem
Answer:
1. Perpendicular
2. B and E
3. Congruent
Step-by-step explanation:
Horizontal and vertical lines are always perpendicular. So, the answer for the first gap is PERPENDICULAR.
Line BC is horizontal line, line AB is vertical line, so lines BC and AB are perpendicular and, therefore, angle B is right angle. Line EF is horizontal line, line ED is vertical line, so lines EF and ED are perpendicular and, therefore, angle E is right angle. So, answer for the second option is angles B and E.
Every two right angles are congruent.
Having two pairs of proportional sides and a pair of congruent adjacent angles, you can apply SAS similarity Postulate.
The equation of the line passing through the ordered pair (a,0) and parallel to the line x + 2y = 7 is.
Answer:
The equation of the parallel line is x + 2y = a
Step-by-step explanation:
* lets revise the general form of the linear equation
- The general form of the linear equation is ax + by + c = 0, where
a , b , c are real numbers
- The linear equation represented by a line its slope = -a/b and
intersects the y-axis at point (0 , -c/b) means y-intercept = -c/b
- The parallel lines have equal slopes and different y-intercepts
* Now lets solve the problem
- There is a line with equation x + 2y = 7
- Put the equation in the general form
∵ x + 2y = 7 ⇒ subtract 7 from both sides
∴ x + 2y - 7 = 0
∵ ax + by + c = 0 is the general form of the linear equation
∴ a = 1 , b = 2 , c = -7
∵ The slope of the line is -a/b
∴ The slope of the line -1/2
- We need to find the equation of the parallel line which has the
same slope
∵ The two lines are parallel
∴ Their slopes are equal
∴ The slope of the line is -1/2
∵ The slope depends on a and b
∴ The line has the same value of a and b
∵ a = 1 and b = 2
∵ ax + by + c = 0
∴ The equation of the line is x + 2y + c = 0
- To find c substitute x and y in the equation by the coordinates of
any point on the line
∵ The line passing through point (a , 0)
- Substitute x by a and y by 0
∴ a + 2(0) + c = =
∴ a + c = 0 ⇒ subtract a from both sides
∴ c = -a
- Substitute the value of c in the equation by - a
∴ The equation of the line is x + 2y - a = 0 ⇒ add a for both sides
∴ The equation of the line is x + 2y = a
* The equation of the parallel line is x + 2y = a
- They are equal in slopes and different in y-intercepts
Final answer:
The equation of the line passing through the point (a, 0) and parallel to x + 2y = 7 is y = -0.5x + 0.
Explanation:
To find the equation of a line parallel to the line x + 2y = 7 and passing through the point (a, 0), we need to determine its slope. This can be done by rearranging the given equation in slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept.
First, we rewrite the given equation as 2y = -x + 7 and then divide everything by 2 to get y = -0.5x + 3.5. Since the line we're looking for is parallel to this line, it will have the same slope of -0.5.
So, the equation of the line passing through (a, 0) and parallel to x + 2y = 7 is y = -0.5x + 0.
Which statement is true of x2 + 8x – 6?
(x – 2) is a factor of the polynomial.
(x + 2) is a factor of the polynomial.
(x – 4) is a factor of the polynomial.
The polynomial is prime.
Answer:
The polynomial is prime.
Step-by-step explanation:
There are no factors of -6 that add to give +8. The polynomial cannot be factored using integers. It is prime.
Answer:The polynomial is prime.
Step-by-step explanation:
Evaluate: log1664
a. 1/3
b. 2/3
c. 3/2
log₁₆64 is3/2
What is logarithm?The logarithm is exponentiation's opposite function in mathematics. This indicates that the exponent to which a fixed number, base b, must be raised in order to create a specific number x, is represented by the logarithm of that number.
Given
log₁₆(64) = x
16ˣ=64
(2⁴)ˣ=2⁶
2⁴ˣ=2⁶
4x=6
x=3/2
To know more about logarithm refer to :
https://brainly.com/question/27407133
#SPJ2
The log₁₆64 exists 3/2. Therefore, the correct answer is option c.3/2.
What is a logarithm?The logarithm exists as exponentiation's opposite function in mathematics. This signifies that the exponent to which a fixed number, base b, must be presented to make a specific number x, exists characterized by the logarithm of that number.
Given:
log₁₆(64) = x
16ˣ = 64
Simplifying the above equation, we get
(2⁴)ˣ = 2⁶
2⁴ˣ = 2⁶
4x = 6
x = 3/2
log₁₆(64) = 3/2.
Therefore, the correct answer is option c.3/2.
To learn more about logarithm
https://brainly.com/question/9046022
#SPJ2
Which quadratic equation is equivalent to (X-4)^2-(x-4)-6=0
Where u=x-4?
Answer:
see explanation
Step-by-step explanation:
letting u = x - 4 means the equation can now be expressed as a quadratic
u² - u - 6 = 0 ← quadratic equation in u
Answer:
[tex]u^2 - u - 6 = 0[/tex]
Step-by-step explanation:
We are given [tex](x - 4)^2 - (x -4) -6 = 0[/tex] and u = x - 4
Now we have to replace (X - 4) by "u".
So, we get
[tex]u^2 - u - 6 = 0[/tex]
Here the highest degrees of the equation is 2. Which is called a quadratic equation.
The general form of quadratic equation is [tex]ax^2 + bx + c = 0[/tex], where a≠ 0.
Therefore, the answer is [tex]u^2 - u - 6 = 0[/tex]
julia collects colored beads for craft projects. Of julia's beads, 4/9 are silver, 1/5 are, gold and 1/4 are blue. The rest of the beads are red. Which expression give the closest estimate of the fraction of red beads Julia has?
i need an explanation on how to solve it
Answer:
19 red beads
Step-by-step explanation:
We first need to find a common denominator of 4/9, 1/5 and 1/4.
The common denominator is 180. Like in an expression, what we do to one side we have to do to the other.
Silver - 180/9 = 20 ; 20*4 = 80 so there are roughly 80 sliver beads.
Gold - 180/5 = 36 ; 36*1 = 36 so there are roughly 36 gold beads.
Blue - 180/4 = 45 ; 45*1 = 45 so there are roughly 56 blue beads.
180 - (silver+gold+blue) = red beads
180-161 = 19 red beads b/c ----->
80+36+45+19 = 180
To find the estimate of beads that are red, you add the fractions of silver, gold, and blue beads first and subtract that from the total. In this case, it is estimated that the red beads are 19/180 of Julia's total collection.
Explanation:To find the fraction of the red beads that Julia collects for her craft projects, we first need to sum up the fractions of the silver, gold, and blue beads as these are given fractions.
By addition, we have 4/9 (silver beads) + 1/5 (gold beads) + 1/4 (blue beads). Add these fractions together to get the total fraction of non-red beads. Now, to get the fractions into a form that's easier to add, find the least common denominator (LCD).
The LCD of 9, 5, and 4 is 180. Then, convert each fraction to have this denominator: 80/180 (silver) + 36/180 (gold) + 45/180 (blue). Now you can add these fractions directly to get 161/180.
Since the total should be 1 (or 180/180 to keep the denominator constant), to find the fraction of the red beads, subtract the sum of the other beads from 1. Thus, 1 - 161/180 = 19/180. Therefore, Julia’s collection consists of approximately 19/180 red beads.
Learn more about Fraction Calculation here:https://brainly.com/question/33261284
#SPJ2
For a circle of radius 9 feet, find the arc length s cut off by a central angle of 6°
[tex]\bf \textit{arc's length}\\\\ s=\cfrac{\pi \theta r}{180}~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad degrees\\ \cline{1-1} r=9\\ \theta =6 \end{cases}\implies s=\cfrac{\pi (6)(9)}{180}\implies s=\cfrac{3\pi }{10}\implies s\approx 0.94[/tex]
The arc length s cut off by a central angle of 6 degrees
[tex]$s=\frac{3 \pi}{10} f t$[/tex].
How to estimate arc length?Let 's' define the arc length, '[tex]$\theta$[/tex]' define the central angle in radians and 'r' be the radius of the circle. Then a central angle of '[tex]$\theta$[/tex]' radians in a circle of radius r subtends an arc of length.
We must define [tex]$6^{\circ}$[/tex] in radians
[tex]$s=r \theta$[/tex]
[tex]$180^{\circ}-\pi \mathrm{rad}$[/tex]
[tex]$6^{\circ}-\theta \mathrm{rad}$[/tex]
Then
[tex]$\theta=\frac{6}{180} \cdot \pi=\frac{\pi}{30}$$[/tex]
The arc length s cut off by a central angle of 6 degrees
[tex]$s=9 f t\left(\frac{\pi}{30}\right)=\frac{3 \pi}{10} \mathrm{ft}$$[/tex]
[tex]$s=\frac{3 \pi}{10} f t$[/tex].
Therefore, the arc length s cut off by a central angle of 6 degrees is
[tex]$s=\frac{3 \pi}{10} f t$[/tex].
To learn more about arc length
https://brainly.com/question/1597355
#SPJ2
Please help! 30 POINTS!!!
Answer:
C, D, A
Step-by-step explanation:
A piano, which normally sells for $800, is marked
down to $700. What is the percent of markdown?
A) 100%
B) 87.5%
C) 50%
D) 12.5%
Answer
700 is 87.5% of 800
Step-by-step explanation:
UM Rignt triangles
Pre-Test
Active
UNE REVANING
32:06
Sanjay, Colby, and Arpitha are training to run a marathon. On Saturday, Sanjay ran
[tex] \sqrt{125} [/tex]
miles, Colby ran 13 miles,
and Arpitha ran along the route from the library to her house, as shown in the diagram.
Arpitha's Home
9 miles
6 miles
Library
Which list shows the names in order from the person who ran the shortest distance to the one who ran the greatest
distance?
Colby, Sanjay, Arpitha
Sanjay, Arpitha, Colby
Mark this and retum
Save and Exit
Next
Submit
Answer:sanjay
Step-by-step explanation:
Can someone help me with this I keep getting an answer that it doesn’t give me! And explain it!!!
[tex](100\%-15\%-25\%)\cdot240=60\%\cdot240=144[/tex]
Answer:
C) 144
Step-by-step explanation:
Somewhat Dissatisfied is 15%, and Completely Dissatisfied is 25%. The two dissatisfied parts add to 40%.
That means the two satisfied parts add to 60%.
60% were either Somewhat Satisfied or Completely Satisfied.
240 customers responded to the survey.
60% of 240 = 0.6 * 240 = 144
Answer: C) 144
simplify (x^2/9)^3/8
Answer:
x^1/12
Step-by-step explanation:
Hope this helped!
Which equation shows the commutative property of addition?
Answer:
A-4+3=3+4
Step-by-step explanation:
The commutative property of addition, also known as the order property of addition, means that a given group of numbers can be added in any order and their sum will always be the same.
Answer:
A
Step-by-step explanation:
commutative is where one equals out to another and then when using addition you have to use the plus sign
A walking path across a park is represented by the equation y = -2x+ 5. A
new path will be built perpendicular to this path. The paths will intersect at
the point (-2,9). Identify the equation that represents the new path.
Help
Answer:
[tex]y = \frac{1}{2}x+10[/tex]
Step-by-step explanation:
The given path is:
y = -2x+5
Comparing with the standard form of equation:
y = mx+b
So,
m = -2
We know that product of slopes of two perpendicular lines is -1
Let m1 be the slope of the perpendicular line
m*m1=-1
-2*m1 = -1
m1 = -1/-2
m1 = 1/2
So the slope of perpendicular path is 1/2.
Since the new path passes through (-2,9)
[tex]9 = \frac{1}{2}(-2) +b\\9 = -1 +b\\b = 10[/tex]
Putting the values of m and b in standard form
[tex]y = \frac{1}{2}x+10[/tex]
Hence the equation of new path is:
[tex]y = \frac{1}{2}x+10[/tex] ..
A line has a slope of . Which ordered pairs could be points on a parallel line? Check all that apply.
Answer:(–8, 8) and (2, 2) (–2, 1) and (3, –2)
Step-by-step explanation:
ASAP I NEED TO GRADUATE THIS WEEK
1. How many dice 2 cm long, 2 cm wide, and 2 cm high would
fit into a box 20 cm long, 12 cm wide, and 8 cm high?
a. 240
b. 320
c. 400
Answer:
Part 1) Option a. [tex]240\ dices[/tex]
Part 2) Option c. [tex]9.156.24\ pounds[/tex]
Step-by-step explanation:
Part 1)
step 1
Find the volume of one dice
The volume is equal to
[tex]V=b^{3}[/tex]
we have
[tex]b=2\ cm[/tex]
substitute
[tex]V=2^{3}=8\ cm^{3}[/tex]
step 2
Find the volume of the box
The volume is equal to
[tex]V=LWH[/tex]
we have
[tex]L=20\ cm[/tex]
[tex]W=12\ cm[/tex]
[tex]H=8\ cm[/tex]
substitute
[tex]V=20*12*8=1,920\ cm^{3}[/tex]
step 3
Find the number of dices
Divide the volume of the box by the volume of one dice
[tex]1,920/8=240\ dices[/tex]
Part 2)
step 1
Find the volume of the cylinder
The volume is equal to
[tex]V=\pi r^{2} h[/tex]
we have
[tex]r=9\ ft[/tex]
[tex]h=12\ ft[/tex]
assume
[tex]\pi =3.14[/tex]
substitute
[tex]V=(3.14)(9)^{2}(12)[/tex]
[tex]V=3,052.08\ ft^{3}[/tex]
step 2
Find how many pounds of sand will fit into the cylinder
using proportion
[tex]\frac{3}{1}\frac{pounds}{ft^{3}}=\frac{x}{3,052.08}\frac{pounds}{ft^{3}}\\ \\x=3,052.08*3\\ \\x=9.156.24\ pounds[/tex]
f(x) = 70x + 50
g(x) = 22
Which sentence most accurately compares the graphs of the
functions f(x) and g(x)?
Select one
_______________________
•The graph of g(2) will be above the graph of f(x) for all values of x
•At the y-axis, the graph of f(x) is above g(2) but the graph of g(2) eventually
overtakes (2)
•At the y-axis, the graph of g(x) is above f (2), but the graph of f(x) eventually
overtakes g(2)
•The graph of f(2) will be above the graph of g(2) for all values of x
Answer: 4. The graph of f(2) will be above the graph of g(2) for all values of x
1. y is always 22 no matter what x value, g(2) = 22. However f(x) is a linear equation which increases vertically right up, so the y = (-∞, ∞ )
So not accurate
2. f(x) meets y axis at (0,50) while g(x) meets at (0,22), however, g(2) is (2,22) while f(x) is 190.
So not accurate
3. graph g(x) is not above f(2)
4. It is accurate
Which expression is equivalent to 5^ square root 32x5^ y10^ z15^
Answer:
Option B is correct.
Step-by-step explanation:
[tex]\sqrt[5]{32x^5y^10z^15}[/tex]
We need to solve the above expression.
32 = 2x2x2x2x2 = 2^5
and we know 5√ = 1/5
solving
[tex]=\sqrt[5]{2^5x^5y^{10}z^{15}}\\=(2^5)^{1/5}(5x^5)^{1/5}(y^{10})^{1/5}(z^{15})^{1/5}\\=2xy^2z^3[/tex]
So, simplified form is 2xy^2z^3
So, Option B is correct.
What is the domain of the set {(-3,5),(2,0),(7,-5)}?
D{-3,2,7} is the domain of the set {(-3,5),(2,0),(7,-5)}
What is domain ?The range of values that we are permitted to enter into our function is known as the domain of a function. The x values for a function like f make up this set (x). A function's range is the collection of values it can take as input. After we enter an x value, the function outputs this sequence of values.
To know more about domain refer to :
https://brainly.com/question/11787743
#SPJ2
I'LL INSTANTLY MARK YOU BRAINLY PLS HELP MEEE
How many hours are there in a year without Thursdays and Saturdays?
Answer:
7512 hours
Step-by-step explanation:
There are 8760 hours in a year.
There are 52 hours on Thursdays and Saturdays in a year.
The number of hours for Thurdays and Saturdays in a year is 1248.
8760-1248= 7512
thursdays and saturdays are the best days
Hans wanted to find the length of the hypotenuse of the triangle. Which statement correctly identifies his error?
ANSWER
He did not square 40, he just multiplied by 2.
EXPLANATION
According to the Pythagoras Theorem, the sum of the square of the shorter legs equals the square of the Hypotenuse.
Hans correctly applied the Pythagoras Theorem to obtain:
[tex] {9}^{2} + {40}^{2} = {c}^{2} [/tex]
The next correct step is to evaluate the squares to obtain:
[tex]9 \times 9+ {40} \times 40= {c}^{2} [/tex]
Which gives
[tex]81+1600= {c}^{2} [/tex]
But Hans mistakenly multiplied the exponent of the second square by the base to get
[tex]9 \times 9+ {40} \times2= {c}^{2} [/tex]
Which simplifies to;
[tex]81+ 80= {c}^{2} [/tex]
Therefore the error is that,he did not square 40, he just multiplied by 2.
The first choice is correct.
Answer:
Error: He did not square 40, he multiplied by 2
In calculation of 40² ( Correct was 1600 but he did 80)
The length of hypotenuse is 41 cm
Step-by-step explanation:
Given: In the given right angle triangle.
The two legs are 40 and 9.
The hypotenuse is c
Using Pythagoras theorem,
[tex]c^2=a^2+b^2[/tex]
where, a and b are legs and c is hypotenuse
a=40 , b=9
Substitute into formula
[tex]c^2=40^2+9^2[/tex]
[tex]c^2=1600+81[/tex] Error
Hans did mistake here to calculate square of 40.
instead of square Hans multiply 40 and 2.
[tex]c^2=1600+81[/tex]
[tex]c^2=1681[/tex]
Taking square root
[tex]c=\sqrt{1681}[/tex]
[tex]c=41[/tex]
Hence, The length of hypotenuse is 41 cm
Error: In calculation of 40²
After a gas-filled balloon is released, it rises 90 feet by the end of the first minute. By the end of the second minute, the balloon rises 120 feet, and by the end of the third minute, it rises 150 feet. How many feet would the balloon rise in 8 minutes?
Answer: 300 feet
Step-by-step explanation:
Note that:
[tex]120-90 = 30[/tex]
[tex]150-120 = 30[/tex].
Then the balloon rises at a constant rate of 30 meters per minute.
We can represent this situation through an arithmetic sequence as shown below
[tex]a_n =a_1 + d(n-1)[/tex]
Where [tex]a_1=90[/tex] is the first term of the sequence and [tex]a_n[/tex] is the n-th term of the sequence and [tex]d=30[/tex] is the common difference between two consecutive terms.
In this case we look for the height of the balloon after 8 minutes.
Then we look for [tex]a_8[/tex]
[tex]a_8 = 90 + 30(8-1)[/tex]
[tex]a_8 = 90 + 30(7)[/tex]
[tex]a_8 = 300[/tex]
Answer:
[tex]\boxed{\text{300 ft}}[/tex]
Step-by-step explanation:
You have an arithmetic sequence in which
a₁ = 90
a₂ = 120
a₃ = 150
1. Calculate the explicit formula
This is an arithmetic sequence, because there is a constant difference of 30 between consecutive terms.
The explicit formula for the nth term of an arithmetic sequence is
aₙ = a₁ + d(n - 1 )
a₁ is the first term, and d is the difference in value between consecutive terms. Thus,
aₙ = 90 + 30(n - 1) = 90 + 30n - 30
aₙ = 30n + 60
2. Calculate the eighth term
a₈ = 30 × 8 + 60 = 240 + 60 = 300
[tex]\text{In 8 min, the balloon rises }\boxed{\textbf{300 ft}}[/tex]
If the graph of the following parabola is shifted one unit left and two units up, what is the resulting equation in vertex form? x^2=12
ANSWER
[tex]{(x + 1)}^{2} =12(y - 2)[/tex]
EXPLANATION
The original parabola has equation
[tex] {x}^{2} = 12y[/tex]
This parabola has its vertex at the origin:
If the parabola is shifted one unit left and two units up, then its new vertex is at (-1,2).
The equation of the new parabola is now of the form:
[tex] {(x - h)}^{2} =1 2(y - k)[/tex]
where (h,k) is the vertex.
Substitute the vertex to get:
[tex] {(x - - 1)}^{2} =12(y - 2)[/tex]
[tex]{(x + 1)}^{2} =12(y - 2)[/tex]
According to this diagram what is cos 16
Option: B is the correct answer.
B) [tex]\dfrac{24}{25}[/tex]
Step-by-step explanation:We know that the cosine trignometric ratio corresponding to a angle theta(θ) is defined as the ratio of the adjacent side to the angle theta to the hypotenuse of the triangle containing θ as one of the angle.
By looking at the figure we observe that the triangle is a right angled triangle and the length of the side adjacent to angle 16° is: 24 and the hypotenuse of the triangle is: 25.
Hence, we get:
[tex]\cos 16=\dfrac{24}{25}[/tex]
According to the given figure, the value of Cos 16° = 24/25.
Hence the correct option is B.
Given that a right triangle with hypotenuse 25, base 24 and the perpendicular is 7 units.
We need to find the value of Cos16°.
To find the value of cos(16°) in the given right triangle, we can use the trigonometric ratio for cosine:
cos(θ) = adjacent side / hypotenuse
In this case, θ = 16°, and we know the adjacent side is the base of the right triangle, which is 24 units, and the hypotenuse is 25 units.
Now, plug the values into the formula:
cos(16°) = 24 / 25
Hence the value of Cos(16°) = 24 / 25
Hence the correct option is B.
Learn more about Cosine Function click;
https://brainly.com/question/3876065
#SPJ6
How does the volume of a cone compare to the volume of a cylinder with the same radius and height?
one-third of the volume
one-half of the volume
twice the volume
triple the volume
Answer:
one-third of the volumeStep-by-step explanation:
[tex]\text{The formula of volumes of:}\\\\a\ cone:\ V_{cone}=\dfrac{1}{3}\pi r_1^2H_1\\\\a\ cylinder:\ V_{cylinder}=\pi r_2^2H_2\\\\\text{If cone and cylinder are with the same radius and height, then:}\\\\r_1=r_2=r\ \text{and}\ H_1=H_2=H\\\\V_{cone}=\dfrac{1}{3}\pi r^2H,\ V_{cylinder}=\pi r^2H\to V_{cone}=\dfrac{1}{3}V_{cylinder}[/tex]
Two certificates of deposit pay interest that differ by 3%. Money invested for one year in the first CD earns $240 interest. The same principal invested in the other CD earns $360. Find the two rates of interest. Smaller value and Larger value (%)
a = interest rate of first CD
b = interest rate of second CD
and again, let's say the principal invested in each is $X.
[tex]\bf a-b=3\qquad \implies \qquad \boxed{b}=3+a~\hfill \begin{cases} \left( \frac{a}{100} \right)X=240\\\\ \left( \frac{b}{100} \right)X=360 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \left( \cfrac{a}{100} \right)X=240\implies X=\cfrac{240}{~~\frac{a}{100}~~}\implies X=\cfrac{24000}{a} \\\\\\ \left( \cfrac{b}{100} \right)X=360\implies X=\cfrac{360}{~~\frac{b}{100}~~}\implies X=\cfrac{36000}{b} \\\\[-0.35em] ~\dotfill\\\\[/tex]
[tex]\bf X=X\qquad thus\qquad \implies \cfrac{24000}{a}=\cfrac{36000}{b}\implies \cfrac{24000}{a}=\cfrac{36000}{\boxed{3+a}} \\\\\\ (3+a)24000=36000a\implies \cfrac{3+a}{a}=\cfrac{36000}{24000}\implies \cfrac{3-a}{a}=\cfrac{3}{2} \\\\\\ 6-2a=3a\implies 6=5a\implies \cfrac{6}{5}=a\implies 1\frac{1}{5}=a\implies \blacktriangleright 1.2 = x\blacktriangleleft[/tex]
[tex]\bf \stackrel{\textit{since we know that}}{b=3+a}\implies b=3+\cfrac{6}{5}\implies b=\cfrac{21}{5}\implies b=4\frac{1}{5}\implies \blacktriangleright b=4.2 \blacktriangleleft[/tex]
Solve by taking the square root of both sides 4(x-4)^2-180=0
Answer:
x = 4 ± 3[tex]\sqrt{5}[/tex]
Step-by-step explanation:
Given
4(x - 4)² - 180 = 0 ( add 180 to both sides )
4(x - 4)² = 180 ( divide both sides by 4 )
(x - 4)² = 45 ( take the square root of both sides )
x - 4 = ± [tex]\sqrt{45}[/tex] = ± 3[tex]\sqrt{5}[/tex]
Add 4 to both sides
x = 4 ± 3[tex]\sqrt{5}[/tex]
The value of x is equal to [tex]4 +3\sqrt{5}[/tex] and [tex]4 -3\sqrt{5}[/tex] by solving the quadratic equation that is taking the square root of both sides and also by using the concept of transposition.
Given the quadratic equation [tex]4(x-4)^2-180=0[/tex] by taking the square root of both sides
To solve a quadratic equation [tex]4(x-4)^2-180=0[/tex] by taking the square root of both sides, follow steps:
Step 1: Consider the given quadratic equation:
[tex]4(x-4)^2-180=0[/tex]
Add by 18 on both sides, gives;
[tex]4(x-4)^2-180+180=0+180[/tex]
On operating algebra sum results:
[tex]4(x-4)^2=180[/tex]
Step 2: Isolate the LHS [tex]4(x-4)^2[/tex] from number 4 by dividing both sides by 4 yields:
[tex]\frac{4(x-4)^2}{4} =\frac{180}{4}[/tex]
On cancelation of 4 on LHS and divide 180 by 4 on RHS results in :
[tex](x-4)^2=45[/tex]
Factorize RHS with a perfect square 9 :
[tex](x-4)^2=9\times5[/tex]
Step 3: Taking the square root of both sides results :
[tex]\sqrt{(x-4)^2} = \sqrt{9\times5}[/tex]
On taking square roots results:
[tex](x-4) = \pm3\sqrt{5}[/tex]
Add by 4 on both sides, gives:
[tex]x=4 \pm3\sqrt{5}[/tex]
Therefore, the value of x is equal to [tex]4 +3\sqrt{5}[/tex] and [tex]4 -3\sqrt{5}[/tex] by solving the quadratic equation that is taking the square root of both sides and also by using the concept of transposition.
Learn more about quadratic equation here:
https://brainly.com/question/30098550
#SPJ4
The sum of two angles is 180. One of the angles measures 96 degrees. What is the measure of the second angle?
Answer:
How many characteristics are used to describe living things?
Step-by-step explanation:
Answer: 84
Step-by-step explanation:
Subtract the total (180 degrees) from the known angle (96 degrees).
180-96=84