How do I simplify this expression?
Answer:
[tex]a=1\\\\b=7[/tex]
Step-by-step explanation:
[tex]\dfrac{x^2 (y^3)^4}{xy^5}\\\\\\=x^{2 -1} \cdot \dfrac{y^{3 \times 4}}{y^5}\\\\\\=x^1 \cdot \dfrac{y^{12}}{y^5}\\\\\\=x^1 \cdot y^{12-5}\\\\\\=x^1 \cdot y^7\\\\\text{Hence a = 1, b = 7}[/tex]
It+is+said+60%+of+families+own+a+pet. +of+a+sample+of+95+families,+70+owned+pets. +perform+a+hypothesis+test+to+determine+whether+the+percent+of+families+who+own+pets+is+different+than+60%
There is sufficient evidence to conclude that, the percentage of the families who own a pet is different than 60%.
What are null hypotheses and alternative hypotheses?In null hypotheses, there is no relationship between the two phenomena under the assumption that it is not associated with the group. And in alternative hypotheses, there is a relationship between the two chosen unknowns.
It Is said That 60% of families own a pet.
Of a sample of 95 families, 70 owned pets.
Whether the percent of families who own pets is different than 60%.
Let P be a proportion of the family who owns pets
Then by the test, we have
H₀: P = 0.60
Hₐ: P ≠ 60
Then by the test statistic, we have
[tex]z_o = \dfrac{\bar{P} - P_o}{\sqrt{\dfrac{P_o(1 - P_o)}{n}}}[/tex]
Where
[tex]\bar P[/tex] = sample proportion
P₀ = hypothesis proporion
n = sample size
Then we have
[tex]\bar P[/tex] = x/n
[tex]\bar P[/tex] = 70/95
[tex]\bar P[/tex] = 0.74
Then the test statistic will be
[tex]z_o = \dfrac{0.74-0.60}{\sqrt{\dfrac{0.60(1-0.60)}{95}}}[/tex]
z₀ = 2.785
Then the critical region will be
Critical value = ± [tex]z_{\alpha /2}[/tex]
α = 0.05
α/2 = 0.025
Then we have
z₀.₀₂₅ = 1.96
Then the critical value will be
Critical value = ± 1.96
We reject if [tex]|z_o| > |z_{\alpha /2}|[/tex]
We have
[tex]|z_o| > |z_{\alpha /2}|\\[/tex]
2.79 > 1.96
We reject the null hypothesis at a 5% significance level.
There is sufficient evidence to conclude that, the percentage of the families who own a pet is different than 60%.
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given f(x)=5(4-x) what is the value of f(-7)
So we replace "x" with the necessary value (-7):
[tex]f( - 7) \: = \: 5(4 \: - \: ( - 7))[/tex]
[tex]f( - 7) \: = \: 5(4 \: + \: 7)[/tex]
[tex]f( - 7) \: = \: 5 \: \times \: 11[/tex]
[tex]f( - 7) \: = \: \boxed{ \bold{55}}[/tex]
Answer:[tex] \boxed{ \bold{55}}[/tex]
MissSpanish2x + 5y = -16 solve for Y
Answer:
y = -(2x+16) / 5
Step-by-step explanation:
2x + 5y = -16
5y = -2x - 16
y = (-2x - 16) / 5
y = -(2x+16) / 5
what is 6÷2(1+2)
someone help
[tex]\huge\text{Hey there!}[/tex]
[tex]\mathsf{6\div2(1 + 2)}[/tex]
[tex]\mathsf{= \dfrac{6}{2}(1 + 2)}[/tex]
[tex]\mathsf{= \dfrac{6}{2}\times(1 + 2)}[/tex]
[tex]\mathsf{= \dfrac{6}{2}\times \bf 3}[/tex]
[tex]\mathsf{= \bold{3}\times3}[/tex]
[tex]\mathsf{= \bf 9}[/tex]
[tex]\huge\textbf{Therefore, your answer should be:}[/tex]
[tex]\huge\boxed{\frak{9}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Find the value that completes the proportion. 27/90 = 3/?
a. 10
b. 27
c. 9
d. 3
Answer:
a. 10.
Step-by-step explanation:
27 / 3 = 9
90/10 = 9
So it's 10.
can someone help me with this problem? thank you!
Answer:
When 6x - 4 = 8, x = 2.
Step-by-step explanation:
6x - 4 = 8
Add 4 to both sides.
6x = 12
Divide both sides by 6.
x = 2
Proof:
6x - 4 = 8
Substitute variable.
6(2) - 4 = 8
Multiply 6 and 2.
12 - 4 = 8
Subtract 4 from 12.
8 = 8
Answer:
x is 2
Step-by-step explanation:
Simplify equation
What happens to one side must happen to the other
Add 4 to both sides
This tells us 6x is 12
Divide both sides by 6
X is 2
the surface area of a cylinder is 140 pie square feet, and its height is 9 feet. find its radius
Answer:
the radius is 2.02
Step-by-step explanation:
use the formula to solve the radius of a cylinder
Maria is on a hike. If she hikes to the scenic lookout on the following map first, she will have to hike farther than if she
went straight to the end of the hike.
Y
end
scenic lookout
5 6 7
1
765
4
6+
5+
432
23
-2+
-3+
-4+
-5+
67
7-6-5-4-3-2
Maria
Coordinate values on the map are in kilometers.
1
1
N
HE
Based on the distance to the end of the hike and the distance to the scenic lookout, we can calculate that the straight route is 2 km shorter than the scenic lookout route.
Which route is shorter for Maria?If Maria took the straight route to the end of the Hike from the coordinates, (4, -4) to (-5, 5), she would have to walk 13 km.
If she went the scenic lookout route, she would have to first go to (2,3) before going to (-5,5) which is 15 km.
The difference is:
= 15 - 13
= 2 km
A more readable version of the question is:
Maria is on a hike. If she hikes to the scenic lookout on the following map first, she will have to hike farther than if she went straight to the end of the hike.
3 connected points on a coordinate plane. The point labeled, "Maria," is at 4, -4. The point labeled, "end," is at -5, 5.
A solid line connect the points "Maria" and "end." The point labeled, "scenic lookout," is at 2, 3. Dashed lines connect "Maria" to "scenic lookout" and connect "scenic lookout" to "end."
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Answer:
2KM
Step-by-step explanation:
Class A has 26 pupils and class B has 14 both classes sit the same maths test . The mean score for class A is 66 the mean score for both classes is 66. What is the mean score in maths test for class B
Answer:
66
Step-by-step explanation:
this is actually an almost trick question because it wants to confuse you!
Here's the trick
to work out a mean (average) you add all the components together then divide by the amount of groups.
but here they didn't give you components just the mean of the classes...both of them.
the question says "The mean fpor class A is 66, the mean score for BOTH classes is 66"
so this means that Class B's mean score is 66 too
hope this helps
What is the Product?
The given,matrix is [1 -4 5 -7] Thus, the correct option is A [3 -12 15 -21].
What is the fundamental principle of multiplication?If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.
The given, a matrix is
[1 -4 5 -7]
The product will be
3. [1 -4 5 -7]
[3 -12 15 -21]
Thus, the correct option is A [3 -12 15 -21].
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Christian owns a small business selling bagels. He knows that in the last week 10 customers paid cash, 14 customers used a debit card, and 38 customers used a credit card. Based on these results, express the probability that the next customer will pay with a credit card as a decimal to the nearest hundredth.
The probability that the next customer will pay with a credit card is 0.61.
What is probability?Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict only the chance of an event to occur i.e., how likely they are going to happen, using it.
Given that Cristian's customers pay using, cash, debit cards and credit cards,
He knows that in the last week 10 customers paid cash, 14 customers used a debit card, and 38 customers used a credit card.
We need to find the probability that the next customer will pay with a credit card,
Therefore,
The favorable outcomes = 38
Total outcomes = 38+10+14 = 62
Therefore,
P(credit cards) = 38/62 = 0.61
Hence the probability that the next customer will pay with a credit card is 0.61.
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Omar keeps track of the number of people inside a music hall to attend a concert by
looking at the number of scanned tickets. He plotted the data on the graph below,
where z 0 represents the time at 6 p.m., then drew a line of best fit. If we extended
the line, what would the value of y tell us when x= 3
Answer:
Lamar wants to predict the number of customers who may be interested in going to a music festival when a ticket to the festival costs $25. Using survey data, Lamar drew a line of best fit to make his prediction. Which should Lamar predict to be the number of customers interested in attending the music festival when the ticket price is $25?/
Lisa kicked a ball against the wall at the indicated angle. what is the measure, in degrees, of <1?
The measure of angle ∠1 will be 68 degrees.
The missing graph is given below.
What is an angle?The angle is the distance between the intersecting lines or surfaces. The angle is also expressed in degrees. The angle is 360 degrees for one complete spin.
Supplementary angle - Two angles are said to be supplementary angles if their sum is 180 degrees.
The diagram is given below.
Then the measure of angle ∠1 will be
68° + 44° + ∠1 = 180°
∠1 = 68°
The measure of angle ∠1 will be 68 degrees.
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Where is the other endpoint located if the midpoint is at (0,-5) and one of the endpoints is (-3,-2)?
Answer:
3,-8
Step-by-step explanation:
x: from -3 to 0 is +3 add +3 more 3
y: from -2 to -5 is -3 add -3 more -8
Mallory took out a loan for $1500. She paid the loan back in 1 year with 7% simple interest. How much did Mallory pay in total?
Answer:
$1605
Step-by-step explanation:
Because this is simple interest, you can convert the 7% into a decimal
Because she payed an EXTRA 7% she payed 107% total
107% is the equivalent to 1.07
By multiplying 1500 x 1.07 = 1605
What is the percent increase of going from 40 to 60
The percent increase of going from 40 to 60 is 50%.
We have the Formula
Percent Increase = (New Value - Original Value) / Original Value x 100
As, the values changes from 40 to 60.
So, Percent Increase = (60 - 40) / 40 * 100
Percent Increase = 20 / 40 * 100
Percent Increase = 0.5 * 100
Percent Increase = 50%
Therefore, going from 40 to 60 represents a percent increase of 50%.
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The mean percent of childhood asthma prevalence in 43 cities is 2.25%. A random sample of 31 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than 2.7%? Interpret this probability. Assume that σ= 1.27%.
The probability is
(Round to four decimal place)
The Probability that the mean childhood asthma prevalence for the sample is greater than 2.7% is 0.0357.
What is Probability ?Probability refers to a possibility that deals with the occurrence of random events.
The probability of all the events occurring need to be 1.
For a Normal Distribution, the z-score formula
[tex]z = \dfrac{X-\mu}{\sigma}[/tex]
Here X is the mean and sigma is the standard deviation.
Mean of 2.25% = 2.25
The standard deviation of 1.27%, sigma = 1.27
For Sample 31 the value of the standard deviation is
s = 1.27/√31
s = 0.2442
Substituting the values
Z = ( 2.25 -1.27)/0.2442
Z = 1.8
the p-value from the graph of z and p = 0.9643
To determine value of probability greater than X is 1 - 0.9643 = 0.0357
The Probability that the mean childhood asthma prevalence for the sample is greater than 2.7% is 0.0357.
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Which statements correctly describe the fraction bar diagram shown at left? Check all that apply.
A fraction bar labeled 1 whole divided into 7 parts. 1 part is shaded.
The unshaded portion of the fraction bar represents a unit fraction.
Each part of the whole fraction bar is equal to one-seventh.
The shaded portion of the fraction bar represents a unit fraction.
The shaded portion of the fraction bar represents .
Each part represents a unit fraction.
The statements that describe the fraction bar diagram shown are:
B. Each part of the whole fraction bar is equal to one-seventh.
C. The shaded portion of the fraction bar represents a unit fraction.
E. Each part represents a unit fraction.
What is a fraction bar?A fraction bar is a visual representation of fractions that helps in comparing fractions and carrying out operations with fractions.
Here, each part of the whole fraction bar is equal to one-seventh, the shaded portion of the fraction bar represents a unit fraction, and each part represents a unit fraction.
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The ruins of a pyramid has 49 blocks in the bottom row. Each additional row has two less blocks than the first. If there are 15 rows in total:
There are 18 blocks in the first row
The missing part of the questionCalculate the number of blocks on the first row
How to determine the number of blocks?The ruin is given as:
Ruin = 49
The common difference is given as:
d = -2
The number of block on each row is then represented as:
Blocks = 48 - 2n
Where n represents the number of rows.
In this case, the first row would have a value of n = 15
So, we have:
Blocks = 48 - 2 * 15
Evaluate
Blocks = 18
Hence, there are 18 blocks in the first row
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A square has a perimeter of 64 yd. What is the length of each side?
[tex]\huge\sf\color{red}{Answer:}[/tex]
Formula:
To get the length of each side just divide it by 4.Lets solve : )
64 ÷ 4 = 16.So the answer would be [tex]\large\sf\color{red}{16}[/tex]
Question meant for only the smartest. Please help would be much appreciated!
Answer:
the length of DE is 1/2*9 = 4.5
hat is the slope of the linear relationship shown in this table of values?
x y
-4 11
2 -1
5 -7
By using any two of the points in the table, we will see that the slope is -2.
How to get the slope for the linear relationship?
A general linear relationship is:
y = a*x + b
Where a is the slope and b is the y-intercept.
Remember that if the line passes through (x₁, y₁) and (x₂, y₂), the slope is:
[tex]a = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
Here we can use the first two points on the table:
(-4, 11) and (2, -1), so the slope is:
[tex]a = \frac{11 - (-1)}{-4 - 2} = 12/-6 = -2[/tex]
Then the slope of the line is -2.
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Find the sum of the following series.
PLEASE SOMEONE HELP!!!
The given sum for n = 1 to n = 15 is equal to 255, so the correct option is B.
How to find the sum of the given series?
We want to find the sum of the series whose elements are of the form:
(2n + 1)
From n = 1 to n = 15.
Then our sum will be:
(2*1 + 1) + (2*2 + 1) + ... + (2*15 + 1).
3 + 5 + ... + 31
This is the sum of all odd numbers in the interval [3, 31]
Which gives:
[tex]S = 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 + 27 + 29 + 31 = 255[/tex]
So the correct option is B.
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Does the order in which the two transformations in a composite transformation affect the final
answer? provide an example to illustrate your answer.
The order in which the two transformations in a composite transformation affect the final answer
How to determine the composite transformation?To determine if order matters or not, I will use the following example and illustration.
Let the coordinate of point A be:
A = (2, 5)
Perform the following transformations:
Translate by (x, y + 1)Dilate by a scale factor of 2First order: Translation before dilation
The translation by (x, y + 1) would give:
A' = (2, 5 + 1)
A' = (2,6)
The dilation by a scale factor of 2 would give
A" = 2 * (2,6)
A" = (4,12)
Second order: Dilation before translation
The dilation by a scale factor of 2 would give
A' = 2 * (2,5)
A' = (4,10)
The translation by (x, y + 1) would give:
A'' = (4, 10 + 1)
A'' = (4,11)
See that the final coordinates in both orders are not the same.
Hence, the order in which the two transformations in a composite transformation affect the final answer
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In multiplication, what is the inverse
of this number?
Give your answer in lowest terms.
1000
450
The multiplicative inverse of 1000/450 is 9/20
How to determine the inverse of the number?The multiplicative inverse of a number x is:
Inverse = 1/x
The number is given as: 1000/450.
So, we have:
Inverse = 1/(1000/450)
Evaluate the expression
Inverse = 450/1000
Simplify
Inverse = 9/20
Hence, the multiplicative inverse of 1000/450 is 9/20
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Use the diagram to answer the question
Step-by-step explanation:
cos(a) = 1/2 or 0.5
that means a = 60°
the cosine value is the x coordinate, the sine value the y coordinate.
so, only an answer with 1/2 as x coordinate can be right.
and therefore, the 4th answer (bottom right) is correct.
Please answer
i need this for my mathhhh
The two column proof for the given angle addition has been carried out below.
How to Carry out two column proof?
1) m∠CZE = m∠1 + m∠2
Reason: Angle Addition Property
2) m∠FXH = m∠3 + m∠4
Reason: Angle Addition Property
3) m∠CZE = m∠FXH
Reason: Given
4) m∠1 + m∠2 = m∠3 + m∠4
Reason: Substitution Property
5) m∠1 = m∠3
Reason: Subtraction Property
6) m∠3 + m∠2 = m∠3 + m∠4
Reason: Substitution Property
7) m∠2 = m∠4
Reason: Subtraction Property
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Create a cylinder with a height of 14 cm and a radius of 10 cm. what can be concluded about the cylinder’s volume when the radius is halved? the volume is one-fourthof the original. the volume is one-thirdof the original. the volume is one-halfof the original. the volume is twice the original.
The conclusion about the cylinder volume when the radius is half is that the volume is one-fourth of the original
How to find the volume of a cylinder?
The volume of a cylinder can be represented as follows;
volume = πr²h
volume = π × 10² × 14
volume = 1400π cm³
Let's half the radius as follows:
radius = 10 / 2 = 5 cm
volume = π × 5² × 14
volume = 350π cm³
Therefore, the new volume is one fourth of the original when the radius is halved.
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Answer:
a
Step-by-step explanation:
factorize x^4 + 2x^3 - 11x^2 - 12x + 36
I need the steps.
Please i need this for today.
[tex]x^4 +2x^3 -11x^2-12x+36\\ \\=x^4-2x^3+4x^3-8x^2-3x^2 +6x-18x+36\\\\=x^3(x-2) +4x^2(x-2) -3x(x-2) -18(x-2)\\\\=(x-2)(x^3 +4x^2 -3x -18)\\\\=(x-2)(x^3+3x^2+x^2+3x-6x-18)\\\\=(x-2)\textbf{[}x^2(x+3)+x(x+3)-6(x+3)\textbf{]}\\\\=(x-2)(x+3)(x^2 +x -6)\\\\=(x-2)(x+3)(x^2 +3x -2x-6)\\\\=(x-2)(x+3)\textbf{[}x(x+3) -2(x+3)\textbf{]}\\\\=(x-2)(x-2)(x+3)(x+3)\\\\=(x-2)^2(x+3)^2[/tex]