25% of what number is 168.75
solve using elimination 5x-9y=-43 3x+8y=68
The following is a correspondence one is
A.{(a,1),(b,1),(c,1)}
B.{(1,a),(2,c),(3,d)
C.{(1,b),(2,c),(3,b)
D.{(a,b),(c,d),(b,d)
(only subject im bad at) What is the Least Common Denominator (LCD) of 7/8 and 1/6 ?
Angle θ lies in the second quadrant, and sin θ = 3/5.
cos θ =
tan θ =
Answer:
[tex]cos\Theta =\frac{4}{5}[/tex]
[tex]tan\Theta =\frac{3}{4}[/tex]
Step-by-step explanation:
Given : sin θ = 3/5
To Find : value of cos θ and tan θ
Solution :
use the identity:
[tex]sin^{2}\Theta +cos^{2}\Theta =1[/tex]
putting value of sin θ
⇒ [tex](\frac{3}{5})^{2} + cos^{2}\Theta =1[/tex]
⇒[tex]\frac{9}{25} +cos^{2}\Theta =1[/tex]
⇒[tex]cos^{2}\Theta = 1-\frac{9}{25}[/tex]
⇒[tex]cos^{2}\Theta = \frac{16}{25}[/tex]
⇒[tex]cos\Theta = \sqrt{\frac{16}{25}}[/tex]
⇒[tex]cos\Theta =\frac{4}{5}[/tex]
Thus , [tex]cos\Theta =\frac{4}{5}[/tex]
Now to find value of tan θ
Since we know that
⇒ [tex]tan\Theta =\frac{sin\Theta }{cos\Theta }[/tex] (identity)
⇒[tex]tan\Theta =\frac{\frac{3}{5} }{\frac{4}{5} }[/tex]
⇒[tex]tan\Theta =\frac{3}{5}\div \frac{4}{5}[/tex]
⇒[tex]tan\Theta =\frac{3}{5}\times \frac{5}{4}[/tex]
⇒[tex]tan\Theta =\frac{3}{4}[/tex]
Thus , the value of
[tex]tan\Theta =\frac{3}{4}[/tex]
[tex]cos\Theta =\frac{4}{5}[/tex]
Final answer:
This detailed answer provides the values of cos θ and tan θ for an angle θ in the second quadrant given sin θ = 3/5. It explains the process using the Pythagorean identity and the characteristics of the second quadrant.
Explanation:
cos θ = -4/5
tan θ = -3/4
Given sin θ = 3/5 and the angle θ lies in the second quadrant, we can determine cos θ using the Pythagorean identity. Since sin θ = 3/5 is positive in the second quadrant, the x-coordinate in the triangle would be negative. Therefore, cos θ = -4/5. Similarly, tan θ can be calculated as tan θ = sin θ / cos θ = (3/5) / (-4/5) = -3/4.
Prove:
lim x^3 = 8.
x approaches 2
Use the quadratic formula to solve 9x2 + 6x – 17 = 0
The standard form of a quadratic equation is :
ax² + bx + c = 0
And the quadratic formula is:
[tex] x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} [/tex].
So, first step is to compare the given equation with the above equation to get the value of a, b and c.
So, a = 9, b = 6 and c = - 17.
Next step is to plug in these values in the above formula. Therefore,
[tex] x=\frac{-6\pm\sqrt{6^2-4*(9)*(-17)}}{2*9} [/tex]
[tex] =\frac{-6\pm\sqrt{36+612}}{18} [/tex]
[tex] =\frac{-6\pm\sqrt{648}}{18} [/tex]
[tex] =\frac{-6\pm\sqrt{324*2}}{18} [/tex]
[tex] =\frac{-6\pm\sqrt{324}*\sqrt{2}}{18} [/tex]
[tex] =\frac{-6\pm18*\sqrt{2}}{18} [/tex]
[tex] =-\frac{6}{18} \pm\frac{18\sqrt{2}}{18} [/tex]
[tex] =-\frac{1}{3} \pm\sqrt{2} [/tex].
So, x = [tex] -\frac{1}{3} \pm\sqrt{2} [/tex]
Answer: x= -1 + 3 sq root 2 /3
Step-by-step explanation:
the plus has a Line under it
what is the coefficient of the term 13a in the expression 13a+6b
Answer:
The coefficient of the term 13a is, 13
Step-by-step explanation:
Coefficient term are the numbers that multiply the variables or letters
In the given expression: [tex]13a+6b[/tex]
13a means 13 times a , and a is the variable,
so 13 is the coefficient .
6b means 6 times b , and b is the variable ,
so 6 is the coefficient .
therefore, the coefficient of the term 13a in the given expression is, 13.
Help Me Please???:):D
four years after a hedge maple tree was planted, its height was 9 feet. eight years after it was planted, the hedge maple tree's height was 12 feet. what is the growth rate of the hedge maple? what was its height when it was planted?? ...?
The growth rate of the hedge maple tree is 0.75 feet per year, and the tree's original height when it was planted was 6 feet.
Explanation:We are tasked with finding the growth rate of a hedge maple tree and its original height when it was planted based on the given data. The tree's height was recorded at two different times: Four years after it was planted, its height was 9 feet, and eight years after planting, its height reached 12 feet.
To calculate the growth rate per year, we take the difference in height over the difference in time:
Growth rate = (Height at 8 years - Height at 4 years) / (Time at 8 years - Time at 4 years)
Thus, Growth rate = (12 feet - 9 feet) / (8 years - 4 years) = 3 feet / 4 years = 0.75 feet per year.
To determine the original height when the tree was planted, we can subtract the total growth over the four years from the height at four years after planting:
Original height = Height at 4 years - (Growth rate * 4 years)
Original height = 9 feet - (0.75 feet/year * 4 years) = 6 feet.
What is the coefficient of the term 53xy ? A. 5 B.1/3 C.5xy D.5/3
Answer:
the answer is D, TRUST ME
Step-by-step explanation:
The coefficient of the term (5/3) x y is 5/3.
What is an algebraic expression?An algebraic expression is consists of variables, numbers with various mathematical operations,
The given expression is,
(5/3) x y
The coefficient of any expression is the numerical term,
Numerical term in the expression is 5/3.
So, the coefficient of the term (5/3) x y is 5/3.
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Which of the following represents the set of possible rational roots for the polynomial shown below?
x^3+5x^2-8x-20=0
A.{1/2, 1,2, 5/2, 4, 5, 10, 20}
B. {+/-1, +/-2, +/-4, +/-5, +/-10}
C. {+/-1/2, +/-1, +/-2, +/-5/2, +/-4, +/-5, +/-10, +/-20}
D. {+/-2/5, +/-1/2, +/-1, +/-2, +/-2/5, +/-1/5, +/-1/10} ...?
The set of possible rational roots for the polynomial is {±1, ±2, ±4, ±5, ±10, ±20}.
Thus, option (B) is correct.
Given:
[tex]x^3+5x^2-8x-20=0[/tex]
Using Rational Root Theorem
if a rational number p/q is a root of the polynomial, then p is a factor of the constant term, and q is a factor of the leading coefficient.
Here, p= -20 and q= 1.
So, the factors of -20 are:
-20, -10, -5, -4, -2, -1, 1, 2, 4, 5, 10, 20.
The factors of 1 (leading coefficient) are:
-1, 1.
Therefore, the possible rational roots are the combinations of these factors, where the numerator is a factor of -20, and the denominator is a factor of 1.
Combining the factors, the set of possible rational roots:
{±1, ±2, ±4, ±5, ±10, ±20}
Thus, option (B) is correct.
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A business purchased for $650,000 in 1994 is sold in 1997 for $850,000. What is the annual rate of return for this investment?
Find tan θ if sec θ = square root of thirty seven divided by six and sin θ < 0.
tan(θ) = -1/6.
Given that sec(θ) = √37/6 and sin(θ) < 0, we can find tan(θ) using the trigonometric identity:
sec²(θ) - tan²(θ) = 1
First, we need to find the value of tan(θ) using the given information:
Since sec(θ) = √37/6, we know that sec(θ) = 1/cos(θ), so cos(θ) = 6/√37.
Since sin²(θ) + cos²(θ) = 1, we can find sin(θ):
sin²(θ) + (6/√37)² = 1
sin²(θ) + 36/37 = 1
sin²(θ) = 1 - 36/37
sin²(θ) = (37-36)/37
sin²(θ) = 1/37
Given that sin(θ) < 0, sin(θ) is negative. Therefore, sin(θ) = -1/√37.
Now that we have sin(θ) and cos(θ), we can find tan(θ):
tan(θ) = sin(θ)/cos(θ)
tan(θ) = (-1/√37) / (6/√37)
tan(θ) = -1/6
Therefore, tan(θ) = -1/6.
How much of the circle is shaded? Write your answer as a fraction in simplest form?
Answer:
[tex]5/14[/tex]
Step-by-step explanation:
Let
x-----> the shaded area
we know that
[tex]x+\frac{1}{7}=\frac{1}{2}[/tex]
solve for x
Multiply by [tex]14[/tex] both sides
[tex]14x+2=7[/tex]
[tex]14x=7-2[/tex]
[tex]14x=5[/tex]
Divide by [tex]14[/tex] both sides
[tex]x=5/14[/tex] ----> fraction irreducible
What does x equal
8=3+x/-6
Find the greatest common factor of the following monomial.
37x^3y^6 x^6y^2
Express x in terms of the other variables in the diagram below:
From the diagram below , x = t ( r - h ) / h
Further explanationFirstly , let us learn about trigonometry in mathematics.
Suppose the ΔABC is a right triangle and ∠A is 90°.
sin ∠A = opposite / hypotenusecos ∠A = adjacent / hypotenusetan ∠A = opposite / adjacentThere are several trigonometric identities that need to be recalled, i.e.
[tex]cosec ~ A = \frac{1}{sin ~ A}[/tex]
[tex]sec ~ A = \frac{1}{cos ~ A}[/tex]
[tex]cot ~ A = \frac{1}{tan ~ A}[/tex]
[tex]tan ~ A = \frac{sin ~ A}{cos ~ A}[/tex]
Let us now tackle the problem!
Look at ΔADE in the attachment.
We will use the following formula to find relationship between variable t and h:
tan ∠A = opposite / adjacent
[tex]\tan \angle A = \frac{DE}{AD}[/tex]
[tex]\large {\boxed{ \tan \angle A = \frac{h}{t} } }[/tex] → Equation 1
Look at ΔABC in the attachment.
We will use the following formula to find relationship between variable r , t and x:
tan ∠A = opposite / adjacent
[tex]\tan \angle A = \frac{BC}{AB}[/tex]
[tex]\large {\boxed{ \tan \angle A = \frac{r}{x + t} } }[/tex] → Equation 2
Next we can substitute equation 1 to equation 2 :
[tex]\tan \angle A = \frac{r}{x+t}[/tex]
[tex]\frac{h}{t} = \frac{r}{x+t}[/tex]
[tex](x + t)h = r ~ t[/tex]
[tex](x + t) = \frac{(r ~ t)}{h}[/tex]
[tex]x = \frac{(r ~ t)}{h} - t[/tex]
[tex]x = \frac{(r ~ t)}{h} - \frac{(h ~ t)}{h}[/tex]
[tex]\large {\boxed {x = \frac{t(r - h)}{h}} }[/tex]
Learn moreCalculate Angle in Triangle : https://brainly.com/question/12438587Periodic Functions and Trigonometry : https://brainly.com/question/9718382Trigonometry Formula : https://brainly.com/question/12668178Answer detailsGrade: College
Subject: Mathematics
Chapter: Trigonometry
Keywords: Sine , Cosine , Tangent , Opposite , Adjacent , Hypotenuse , Triangle , Fraction , Lowest , Function , Angle
Which of the following expressions are equal to the one below?
(8+7) x 11
A. 8+ (7x11)
B. 11 x (8+7)
C. 8 x 11 - 7 x 11
D. 11 x 7 + 11 x 8
Tommy has a pet monkey. Every day, his monkey eats 4 apples in the morning. The monkey also eats two bananas for every banana that Tommy eats.
Write an equation to describe this situation where x is the number of bananas Tommy eats and y is the total number of pieces of fruit the monkey eats.
Answer:
The required equation is : [tex]2x+4[/tex]
Step-by-step explanation:
Tommy's monkey eats 4 apples in the morning. The monkey also eats two bananas for every banana that Tommy eats.
Let Tommy eats x bananas, then the monkey eats 2x bananas.
Then, the required equation will be :
[tex]2x+4[/tex]
Jorge's hourly salary is $7.65. last week he worked 23 hour week how much did he earn
A car is driving at a speed of 45mi/h. what is the speed of the car in feet per minute
Which of the following represents this function written in standard form?
y=2(x+1)(x-6)
a. y=3x^2-10x-12
b.y=2x^2-10x+6
c. y=2x^2-5x-12
d. y=2x^2-14x+12
Which of the following represents this function written in standard form?
y=2(x+1)(x-6)
a. y=3x^2-10x-12
b.y=2x^2-10x+6
c. y=2x^2-5x-12
d. y=2x^2-14x+12
Answer:
[tex]y=2x^2-10x-12[/tex]
Step-by-step explanation:
[tex]y=2(x+1)(x-6)[/tex]
write the given function in standard form
Standard form is [tex]y=ax^2+bx+c[/tex]
[tex]y=2(x+1)(x-6)[/tex] multiply the parenthesis using FOIL method
[tex]y=2(x^2-6x+1x-6)[/tex]
multiply 2 inside the parenthesis
[tex]y=2(x^2-6x+1x-6)[/tex]
[tex]y=2x^2-12x+2x-12[/tex]
Combiene like terms
[tex]y=2x^2-10x-12[/tex]
How do i write an akgebaric expression? Carrisa divided 40 grapes equally amoung f friends. How many grapes did each friend get?
How many friends?
40
____
X
40/ x
3x3 + 9x2 + x + 3 factor completely
Changes made to your input should not affect the solution:
(1): "x2" was replaced by "x^2". 1 more similar replacement(s).
3.1 3x3+9x2+x+3 is not a perfect cube
3.2 Factoring: 3x3+9x2+x+3
Thoughtfully split the expression at hand into groups, each group having two terms :
Group 1: x+3
Group 2: 3x3+9x2
Pull out from each group separately :
Group 1: (x+3) • (1)
Group 2: (x+3) • (3x2)
-------------------
Add up the two groups :
(x+3) • (3x2+1)
Which is the desired factorization
3.3 Find roots (zeroes) of : F(x) = 3x2+1
Polynomial Roots Calculator is a set of methods aimed at finding values of x for which F(x)=0
Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers x which can be expressed as the quotient of two integers
The Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading Coefficient
In this case, the Leading Coefficient is 3 and the Trailing Constant is 1.
The factor(s) are:
of the Leading Coefficient : 1,3
of the Trailing Constant : 1
Let us test ....
Polynomial Roots Calculator found no rational roots
Processing ends successfully
In the week before and the week after a holiday there were 10,000 total deaths and 4968 of them occurred in the week before the holiday.
a) construct a 90% confidence interval estimate of the proportion of deaths in the week before the holiday to the total death in the week before and the week after the holiday
b) based on the result does there appear to be any indication that people can temporarily postpone their death to survive the holiday
The confidence interval is calculated based on the given values and can help determine if deaths are temporarily postponed during holidays.
Explanation:To construct a confidence interval estimate of the proportion of deaths in the week before the holiday to the total deaths in the week before and after the holiday, we can use the formula:
p ± z √(p(1- p/ n)
where p is the sample proportion, z is the z-score, and n is the sample size.
In this case, the sample proportion is p = 4968/10000 = 0.4968.
The z-score corresponding to a 90% confidence interval is approximately 1.645. The sample size is n = 10000.
Substituting these values into the formula, we get:
0.4968 ± 1.645 √((0.4968 * 0.5032) / 10000)
Calculating this expression gives us the confidence interval estimate.
Based on the result, we can assess whether there is an indication that people can temporarily postpone their death to survive the holiday. If the lower limit of the confidence interval is significantly lower than the proportion of deaths in the week after the holiday, it suggests that there is a decrease in deaths in the week before the holiday. However, if the lower limit is close to or higher than the proportion of deaths in the week after the holiday, it indicates that there is no evidence of a significant decrease in deaths before the holiday.
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A distribution of numbers has the following five-number summary:
10.0, 15.0, 30.9, 50.0, 63.7
True or False? These numbers can be used to calculate the standard deviation of the distribution. ...?
Answer:
False
Step-by-step explanation:
A five number summary consists of these five statistics: the minimum value, the first quartile, the median, the third quartile, and the maximum value of a set of numbers
A standard deviation is a measure that is used to quantify the amount of variation or dispersion of a set of data values.
Std deviation is the square root of variance
Variance is the average of squares of deviations of each entry from the mean.
Hence from five point summary, we cannot calculated standard deviation of the distribution
4 ALGEBRA 1B QUESTIONS - 70PTS
HOW MANY SOLUTIONS DOES THE SYSTEM OF EQUATIONS HAVE?
1. 3x = -12y + 15 and x+4y=5
2. y= 4x+ 3 and 2y - 8x = 3
3.x + 4y =12 and 5x - 20y =60
4. y -5x = -6 and 3y - 15x = -12
1. Infinite many solution.
2. No solution
3. One solution
4. No solution
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
Depending upon the situation we have three case
[tex]a_1/ a_2 = b_1/ b_2 = c_1 / c_2[/tex] then line is Coincident and have infinite many solution.
and, [tex]a_1/ a_2 \neq b_1/ b_2[/tex] then line is Intersecting and have one solution.
and, [tex]a_1/a_2 = b_1/ b_2 \neq c_1/ c_2[/tex] then line is Parallel and have No solution.
1. 3x = -12y + 15 and x+4y=5
3x + 12y - 15= 0 and x+ 4y- 5 = 0
So, [tex]a_1/ a_2 = b_1/ b_2 = c_1 / c_2[/tex] then line is Coincident and have infinite many solution.
2. 4x - y +3 = 0 and -8x + 2y -3 = 0
So, [tex]a_1/a_2 = b_1/ b_2 \neq c_1/ c_2[/tex] then line is Parallel and have No solution.
3. x+ 4y - 12= 0 and 5x - 20y -60 = 0
So, [tex]a_1/ a_2 \neq b_1/ b_2[/tex] then line is Intersecting and have one solution.
4. -5x + y +6 = 0 and -15x + 3y +12 = 0
So, [tex]a_1/a_2 = b_1/ b_2 \neq c_1/ c_2[/tex] then line is Parallel and have No solution.
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Manny has 48 feet of wood. He wants to use all of it to create a border around a garden. The equation 2l + 2w = 48 can be used to find the length and width of the garden, where l is the length and w is the width of the garden. If Manny makes the garden 15 feet long, how wide should the garden be? 9 feet 18 feet 30 feet 33 feet
Answer:
You can find a width of 9 feet.
Step-by-step explanation:
The width of the rectangular shaped garden should be 9 feet
What is the Perimeter of a Rectangle?The perimeter P of a rectangle is given by the formula, P=2 ( L + W) , where L is the length and W is the width of the rectangle.
Perimeter P of rectangle = 2 ( Length + Width )
Given data ,
Let the perimeter of the rectangle be P = 48 feet
We can use the equation given to solve for the width w of the garden:
2l + 2w = 48
Substituting l = 15, we get:
2(15) + 2w = 48
30 + 2w = 48
Subtracting 30 from both sides, we get:
2w = 18
Dividing both sides by 2, we get:
w = 9 feet
Hence , the width of the garden should be 9 feet
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What is 3/4 of 16 in fractions?
which of the following represents the most accurate estimation of 96-38?