ALGEBRA 2- If f(x)= √x-3 , which inequality can be used to find the domain of f(x)?
a. √x-3 ≥ 0
b. x-3 ≥ 0
c. √x-3 ≤ 0
d. x-3 ≤ 0
Answer:
Option B
Step-by-step explanation:
The given equation function is f(x) =[tex]\sqrt{x-3}[/tex]
Domain of this function will be determined by (x-3) ≥ 0
because square root of negative numbers is not defined.
Option B is the answer.
Write the expressions as a difference and simplify it: 17x−13y+8 and 20x+6y.
The two expressions 17x−13y+8 and 20x+6y can be rewritten as a difference to be -3x - 19y + 8.
Explanation:To rewrite the two expressions 17x−13y+8 and 20x+6y as a difference, you can first list them separately and then combine by subtraction.
17x - 13y + 8
and
20x + 6y
. The difference between these two expressions is obtained by performing the subtraction as follows: (17x - 13y + 8) - (20x + 6y). Now, you can simplify this by removing the parentheses and switching the sign of the terms being subtracted, which results in:
17x - 13y + 8 - 20x - 6y
. Finally, you combine like terms, x-terms with x-terms and y-terms with y-terms, ending up with:
-3x - 19y + 8
which is the simplified difference of the two expressions.
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Kyra multiplied 0.27 by a power of ten and got 2.7. What power of ten did she multiply by?
given that EB bisects <CEA , which statement must be true
Answer: A:<CED is a right angle
B: <CEA is a right angle
D: m<CEB=m<BEA
E: m<DEB=135
Step-by-step explanation
Karen buys 8.5 pounds of flour. She uses 2.5 pounds to bake bread. She keeps the rest of the flour in small storage bags. If each storage bag contains ⅖ pound of flour, how many storage bags does she use?
What value is added to both sides of the equation x2 − 8x = −10 in order to solve by completing the square?−816−44?
Answer:
The correct option is 2. 16 is added to both sides of the equation.
Step-by-step explanation:
The given equation is
[tex]x^2-8x=-10[/tex]
If an expression is defined as [tex]x^2+bx[/tex], then we need to add [tex](\frac{b}{2})^2[/tex] in the expression to make it perfect square.
In the given equation b=-8.
[tex](\frac{b}{2})^2=(\frac{-8}{2})^2=(-4)^2=16[/tex]
We need to add 16 on both the sides to solve by completing the square.
Therefore the correct option is 2. 16 is added to both sides of the equation.
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A sample was taken of dogs at a local dog park on two random days. The counts are displayed in the table below. If there are estimated to be 50 dogs at the park at any given time, which proportion could be used to find the average number of shepherd mixes at the park at any given time?
Answer:
⇒[tex]\frac{8}{21} =\frac{x}{50}[/tex]
Step-by-step explanation:
Let average no. of shepherds be x
there are estimated to be 50 dogs
Thus average no. of dogs / estimated no. of dogs =x/50
Since in sample 1 there are 7 shepherd mix
In sample 2 there are 9 shepherd mix
So total shepherd mix = 9+7=16
Total dogs according to table = 4+7+3+1+2+5+9+5+2+4=42
Thus total shepherd / total dogs = 16/42
A.T.Q
[tex]\frac{16}{42} =\frac{x}{50}[/tex]
⇒[tex]\frac{8}{21} =\frac{x}{50}[/tex]
This proportion could be used to find the average number of shepherd mixes at the park at any given time
Thus option A is correct
The average number of shepherd mixes at the park at any given time is equal to [tex]\frac{8}{21} =\frac{x}{50}[/tex].
Let the average number of shepherd mixes be x.Given the following data:
Estimated population = 50 dogs.To determine the average number of shepherd mixes at the park at any given time:
How to calculate the shepherd mixes.First of all, we would determine the total number of shepherd mixes in sample 1 and sample 2.
Total shepherd mixes = [tex]7 + 9[/tex] = 16 dogs.
For the total dogs:
Total dogs = [tex]4+1+7+3+2+5+9+5+2+4[/tex] = 42 dogs.
The average number of shepherd mixes is given by this mathematical expression:
[tex]\frac{16}{42} =\frac{x}{50}[/tex]
Simplifying further, we have:
[tex]\frac{8}{21} =\frac{x}{50}[/tex]
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Penny uses 3/4 yard fabric for each pillow she makes. How many pillows can she make using 6 yards of fabric. Please show your work
A bike wheel is 26 inches in diameter. What is the bike wheel's diameter in millimeters (1 inch = 25.4 millimeters)?
Given that, a bike wheel is 26 inches in diameter.
We need to convert bike wheel's diameter in millimeters .
Since, 1 inch = 25.4 millimeters.
So, to convert 26 into mm we need to multiply 26 each sides of this identity to convert this into mm. Hence,
1*26 inch = 25.4 * 26 mm.
So, 26 inches = 660.4 mm.
So, the bike wheel's diameter is 660.4 millimeters.
Hope this helps you!
The bike wheel's diameter of 26 inches is equivalent to 660.4 millimeters.
To convert a bike wheel's diameter from inches to millimeters,
we have to use the conversion factor, which is,
1 inch = 25.4 millimeters.
Now multiplying the diameter of the bike wheel,
which is given as 26 inches,
by the conversion factor of 25.4 millimeters per inch.
⇒ 26 inches x 25.4 millimeters per inch = 660.4 millimeters
Therefore, the diameter of the bike wheel in millimeters is 660.4 millimeters.
Therefore, we can convert inches to millimeters by multiplying by 25.4, which is the number of millimeters in one inch.
In this case, the bike wheel's diameter of 26 inches is equivalent to 660.4 millimeters.
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Use the right-hand rule to estimate the area under the graph of y = x2 + 2 for values of x from 0 to 3.
Based on a survey, 3 out of 8 households have a pet. Mike's neighborhood has 192 households.
Based on the survey, how many households in Mike's neighborhood ,begin emphasis,most,end emphasis, likely have a pet?
A.24
B.64
C.72
D.116
72 households in Mike's neighborhood ,begin emphasis, most, end emphasis, likely have a pet.
What is Fraction?
A fraction represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters.
According to question, based on a survey, 3 out of 8 households have a pet. Mike's neighborhood has 192 households.
We have to find how many households in Mike's neighborhood ,begin emphasis, most, end emphasis, likely have a pet.
We get the number of households by following equations:
[tex]\frac{3}{8}[/tex]×[tex]192=72[/tex]
Hence we can conclude that Option C is correct answer.
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Which expression is equal to 728‾‾‾√−563‾‾‾√ ?
−11√ 7
√7
- √7
−37√7
Answer:
The correct option is 3.
Step-by-step explanation:
The given expression is
[tex]7\sqrt{28}-5\sqrt{63}[/tex]
It can be written as
[tex]7\sqrt{4\times 7}-5\sqrt{9\times 7}[/tex]
[tex]7\sqrt{2^2\times 7}-5\sqrt{3^2\times 7}[/tex]
Using product property of radical expressions, we get
[tex]7(\sqrt{2^2}\times \sqrt{7})-5(\sqrt{3^2}\times \sqrt{7})[/tex] [tex][\because \sqrt{ab}=\sqrt{a}\sqrt{b}][/tex]
[tex]7(2\times \sqrt{7})-5(3\times \sqrt{7})[/tex]
[tex]14\sqrt{7}-15\sqrt{7}[/tex]
Taking out common factors.
[tex]\sqrt{7}(14-15)[/tex]
[tex]\sqrt{7}(-1)[/tex]
[tex]-\sqrt{7}[/tex]
Therefore the correct option is 3.
the graph of the equation y=2x+b passes through the point (b, -3). Find b. PLZ SHOW WORK!
Satellites KA-1212 and SAL-11 have spotted a UFO. Scientists want to determine its distance from KA-1212 so they can later determine its size. The distance between the satellites is 900 km. If KA-1212's camera is focused on SAL-11 , it must rotate 60° to see the UFO. If SAL-11's camera is focused on KA-1212, it must rotate 75° to see the UFO. How far is the UFO from KA-1212? Round your answer to the nearest kilometer.
Answer:
The distance of UFO from KA-1212 is 1229.7 km.
Step-by-step explanation:
We are given that,
Distance between the satellites = 900 km
Angle made by the satellite KA-1212 = 60°
Angle made by the satellite SAL-11 = 75°
So, from the figure below,
The third angle is given by = 180° - (60°+75°) = 180° - 135° = 45°
Then, using the law of sines, we have,
[tex]\dfrac{x}{\sin 75}=\dfrac{900}{\sin 45}\\\\x=\dfrac{900\times \sin 75}{\sin 45}\\\\x=\dfrac{900\times 0.966}{0.707}\\\\x=\dfrac{869.4}{0.707}\\\\x=1229.7[/tex]
Thus, the distance of UFO from KA-1212 is 1229.7 km.Satellites KA-1212 and SAL-11 have spotted a UFO. Scientists want to determine its distance from KA-1212 So, it is 1229.7 km.
What is a law of sine?Law of sines is a formula relating the length of the sides of a triangle to the angles of the triangle.
It is given that
Distance between the satellites KA-1212 and SAL-11 = 900 km
Angle made by the satellite KA-1212 = 60°
Angle made by the satellite SAL-11 = 75°
So, the third angle is given by
= 180° - (60°+75°)
= 180° - 135°
= 45°
Using the law of sines, we get
x/sin75° = 900/sin 45°
x = 900 × sin75°/ sin 45°
x = 900 × 0.966/ 0.707
x = 1229.7
Thus, the distance of a UFO from KA-1212 is 1229.7 km.
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The difference between one-half of a number and one-sixth of the number is equal to ten more than one-eighth of that number. Which equation could be used to find the number?
Answer with explanation:
It is given that, the difference between one-half of a number and one-sixth of the number is equal to ten more than one-eighth of that number.
Let the number be x.
Writing the statement in terms of equations
[tex]\frac{x}{2}-\frac{x}{6}=10+\frac{x}{8}[/tex]
This equation can be used to find the number.
Which of the sums below can be expressed as 6(3 + 9)? (3 points)
18 + 54
18 + 9
9 + 15
6 + 54
This could be answered by using the distributive property.
This is an algebra property which is done to multiply a particular term and two or more terms in a set of parentheses.
So for our problem, 6 (3 + 9):
You first, multiply 6 x 3 = 18
And multiply 6 x 9 = 56
Thus, the answer is 18 + 56 = 72
But following the order of operations, you should add first the number inside the parenthesis and then multiply it to the number outside the parenthesis but it will the same answer still. (6 x 12 = 72)
Answer:
18 + 54
Step-by-step explanation:
Take 6 x 3 = 18
6 x 9 = 54
Answer is 18+54
to check answer 18 + 54 = 72
6(3+9)
6(12)= 72
Justin purchased a 20 pound pumpkin for $9.80. How much did he pay per pound.
Justin paid $0.49/pound for his 20 pound pumpkin.
This is determined by dividing the total amount paid ($9.80) by the pound total (20lbs).
9.80 / 20= 0.49
If other factors are held constant, the bigger the sample is, the greater the likelihood of rejecting the null hypothesis.
a. True
b. False
Suppose there is 1.1*f drop in temperature for every thousand feet that an airplane climbs in to the sky if the temperature on the ground is 59.7°F what will the temperature be at an altitude of 11,000 feet
Answer:47.6
Step-by-step explanation:
1.45833 as a fraction
Alex and Freddy collect stamps. The number of stamps in Alex’s collection is in ratio 3:5 to the number of stamps in Freddy’s collection. If Freddy gives Alex 10 stamps, the ratio will change to 7:9. How many stamps are in both collections together?
Answer:
160 stamps
Step-by-step explanation:
Suppose Alex has 3x stamps, Freddy has 5x stamps. After Freddy gives Alex 10 stamps, Alex has 3x+10 while Freddy has 5x-10
The new ratio is 7 to 9, so we have the equation: (3x+10)/(5x-10)=7/9
9(3x+10)=7(5x-10)
27x+90=35x-70
160=8x
x=20
So Alex has 3*20=60 stamps while Freddy has 5*20=100. Together they have
An angel is 5 times its supplement find the measure of bith angels
Select a rule for the following pattern. 44; 440; 4,400; 44,000 . . .
The rule for the following pattern is to multiply 10 with a constant number 44 everyu sequence.
What is mathematical sequence ?Explanation;
44; 440; 4,400; 44,000.
44
44*10 = 440
440*10 = 4400
4400*10 =44000 and so on
A series is an ordered listing of numbers or other factors like geometric items, that often comply with a specific pattern or characteristic. Sequences can be both finite and limitless. A series is a listing of numbers in a sure order. each number in a series is known as a term . every time period in a series has a role.
Sequences are useful in a number of mathematical disciplines ... specially, sequences are the idea for series, which might be crucial in differential equations and evaluation. Sequences are also of hobby of their own proper and can be studied as styles or puzzles, including in the look at of prime numbers.
A number series is a fixed of numbers that observe a selected pattern or rule to get from time period to time period. There are foremost kinds of exclusive sequences, they are mathematics sequences, geometric sequences, quadratic sequences and special sequences. It assists with comprehension, specially for narrative texts. series structures assist college students of various abilities organize information and ideas successfully.
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What conclusions can be made about the series ∞ 6 cos(πn) n n = 1 and the integral test?
In order to select the new board members. The French club held an election 9 out of 18 club in the election voted in the election . What percentage of the members voted
77 pints= ___gal ___qt ___pt
A secant and a tangent meet at a 90 degree angle outside the circle. What must be the difference between the measures of the intercepted arcs?
45 degrees
90 degrees
180 degrees
270 degrees
Answer:
180
Step-by-step explanation:
hope this helps you
Answer:
180 90plus90
Step-by-step explanation:
QUICK HELP! How many terms are in the simplified expression? How many of the terms in the simplified expression are negative?
Expression: 2x^2 - y^2 +5xy - 2y
Final answer:
The simplified expression '2x² - y² + 5xy - 2y' contains four terms, of which two are negative.
Explanation:
The expression given is 2x² - y² + 5xy - 2y To determine how many terms are in this simplified expression, we simply count the distinct variables and constant groupings. In this case, there are four terms: 2x², -y², 5xy, and -2y. Among these, two terms have a negative sign in front of them, indicating that they are negative. Thus, there are two negative terms in the simplified expression.
Help. What is the slope.
So far this semester, Zachary has test scores of 92, 98, 65, 77, 91, and 85. He has one more test to take before the semester ends. What must he score on the last test to earn an average of 85 for the semester? Type a numerical answer in the space provided.