Kendra was asked to find the number of students who planned to attend the evening symphony performance. She was told that 40 percent of the 50 students planned to attend. Kendra’s work is shown below.

Answer:

1/8 I think

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

(-5,4)

To get from B to A, the x value increases 5 and the y value increases 5, for every one unit increase in x, y also increases by 1. 1/5 of the way is 1/5 times 5 = 1. Just increase both x and y by 1 to get (-5, 4)

-6+1 = -5 = x and 3 + 1 = 4 = y (-5,4) is the point 1/5 of the way from B to A

Answer:

Its B

stuff:

ITS BBBBBBBBBBBBBBBBBBBB

Answer:

B

Step-by-step explanation:

Trust me on this, also can I have brainiest please?

Hope you do well! :D

Answer:

1.d because you distribute the 6 to the y and then z so the equation would be 6y+6z

2.a because the commutative property says that no matter the order of the terms you will get the same product so 9x5 would be the same as 5x9

3.a because you distribute the 3 to the y and 5 so the simplifie dversion would be 3y+15

Hope this helps!

Answer:

The 2 factors are -2 and 18.

Step-by-step explanation:

xy = -36

Let y = 0.5x - 11 so

x(0.5x - 11) = -36

0.5x^2 - 11x + 36 = 0

0.5(x^2 - 22x + 72) = 0

(x - 4)(x - 18) = 0

x = 4, 18.

Try x = 18:-

The 2 numbers which are factors of -36 must be  -2 and 18 because they fit the requirement  that 0.5(18) - 11 = 9 - 11 = -2.

Answer:

I’m pretty sure it’s 6 but I’m not 100% sure

Step-by-step explanation:

Answer:

the answer is 6 can you mark me branilist

Step-by-step explanation:

Answer:

c. Ha : μ < 266.

Step-by-step explanation:

Null hypothesis: The mean value is x.

Alternate hypothesis. The mean value is different than x, greater than x, smaller than x...

In this question:

Average of 266 days, so the null hypothesis is that the mean is 266.

In the sample:

He suspects that the generation time is less than 266. So

c. Ha : μ < 266.

Answer:

4:9

Step-by-step explanation:

13-4=9 AND THERES 4 boys so that means there are 9 girls. So 4:9

Answer:

[tex]226.2m^2[/tex]

Step-by-step explanation:

[tex]A_L=2\pi rh=2*\pi *4.5*8\\=226.19467\\=226.1947\\=226.195\\=226.2m^2[/tex]

Answer:

Step-by-step explanation:

Well Mr.Thomas has 50 dollars to spend so if you divide 2.50 from 50 you will get 20 so he can get 20 raffle tickets and still walk out with another 50 in his pocket.

Answer:225 cm

Step-by-step explanation:

Square has 4 equal sides

Area of squares equal length x width

If one side length is 5x-3 , the width is the same

Hence -15 x -15

Answer:

angle S

Step-by-step explanation:

You have to make the triangles congruent. Therefore, you have to flip one triangle vertically and horizontally. (To see the picture google choose the correct correspondence,  I am looking at the one with two triangles in the figure.) If you imagine putting them over top of each other, then U goes over S.

Sorry my answer was so late.

Answer:

The answer is going to be S

Step-by-step explanation:

Answer:

Train 1: 368 mph

Train 2: 358.1 mph

Step-by-step explanation:

We can write 2 equations to represent this problem.

[tex]x+y=726.1[/tex]

[tex]x=9.9+y[/tex]

The x represents the first train and the y represents the second train.

We can plug in x into the first equation.

[tex](9.9+y)+y=726.1[/tex]

[tex]9.9+2y=726.1[/tex]

[tex]2y=716.2[/tex]

[tex]y=358.1[/tex]

Now that we know our y, we can find our x.

[tex]x=9.9+y[/tex]

[tex]x=9.9+358.1[/tex]

[tex]x=368[/tex]

Answer:

The volume question is 1,120 I think

Answer:

89

Step-by-step explanation:

Answer:

-98

Step-by-step explanation:

Because the negative of the number is on the opposite side of a number line.

Answer:

I don't knoooooooooooooooow

Answer: D. To produce treatment groups with similar characteristics

Step-by-step explanation:

By using randomization in sampling, the Sample would be more representative of the Population it is based off of because different demographic characteristics may be picked.

This leads to a situation where the groups have similar characteristics between themselves thereby making it easier for comparison. For example, Group 1 would have certain types of people that will be represented in Group 2 and Group 3 as well. That way the effects of the drug can be properly studied as it affects different people. For instance, say there are 4 obese people in a sample of 10, instead of group one having all obese people, randomization may be able to give group one, 2 obese people and 2 obese people to group 2 as well. That way when comparing, the effects of the drug on the two groups is easier to be compared because the two groups have similar people.

Find the given attachments

Answer:

138.5 and 147.5

Step-by-step explanation:

Set the two integers as x and x+9

Since the two integers add up to 286, set up the equation:

x+(x+9)=286

2x+9=286

2x=277

x=138.5

x+9=147.5

Answer:

Step-by-step explanation:

Hello!

The historical data suggests that the life expectancy in Argentina is equal to the life expectancy in Bolivia.

With the objective of testing if that it hasn't changed, the records of recently deceased people from Argentina and Bolivia were selected at random:

Group 1: Argentina

X₁: Years of life of a recently deceased Argentinian.

n₁= 265

X[bar]₁= 74.8 years

S₁= 4.1 years

Group 2: Bolivia

X₂: Years of life of a recently deceased Bolivian.

n₂= 300

X[bar]₂= 75.4 years

S₂= 4.3 years

The parameters of interest are the population means of the years of life of people in both countries:

H₀: μ₁ = μ₂

H₁: μ₁ ≠ μ₂

α: 0.05

The statistic to use is an approximate standard deviation, and since both samples are quite large, it is valid to use the sample standard deviations in place of the population standard deviations:

[tex]Z= \frac{(X[bar]_1-X[bar]_2)-(Mu_1-Mu_2)}{\sqrt{\frac{S^2_1}{n_1} +\frac{S_2^2}{n_2} } }[/tex]≈N(0;1)

[tex]Z_{H_0}= \frac{(74.8-75.4)-(0)}{\sqrt{\frac{16.81}{265} +\frac{18.49}{300} } }= -2.54[/tex]

The critical values for this test are:

[tex]Z_{\alpha /2}= Z_{0.025}= -1.96[/tex]

[tex]Z_{1-\alpha /2}= Z_{0.0975}= 1.96[/tex]

Using the critical value approach, the decision rule is:

If [tex]Z_{H_0}[/tex] ≤ -1.96 or if [tex]Z_{H_0}[/tex] ≥ 1.96, reject the null hypothesis.

If -1.96 < [tex]Z_{H_0}[/tex] < 1.96, do not reject the null hypothesis.

[tex]Z_{H_0}[/tex] ≤ -1.96 so the decision is to reject the null hypothesis.

So with a 5% significance level, there is enough evidence to reject the null hypothesis, you can conclude that the life expectancy in Argentina is different from the life expectancy in Bolivia.

I hope this helps!

Answer:

Angle B = 106.6 degrees

Step-by-step explanation:

b^2= a^2+c^2-2*a*c*cosB

9*9 = 4*4 + 7*7 - 2*7*4*cosB

81= 16+49-56cosB           Subtract 16 and 49 from both sides

16= -56cosB           Divide by -56 on both sides.

cosB= -16/56         Take the arccosine of both sides

B=arccos(-16/56)                    

B= 106.6

Answer:

B. 106.6

Step-by-step explanation:

To solve for angle B, we can use the law of cosines.

Recall that the law of cosines states [tex]b^2=a^2+c^2-2ab*cos(B)[/tex]

When this is solved for angle B, we get [tex]B=cos^{-1}( \frac{a^2+c^2-b^2}{2ac} )[/tex]

In this triangle, [tex]a=7, b=9, c=4[/tex]

Now, we can plug these numbers into our equation and then simplify to get B.

[tex]B=cos^{-1}( \frac{7^2+4^2-9^2}{2(7)(4)} )\\\\B=cos^{-1}( \frac{49+16-81}{56} )\\\\B=cos^{-1} (\frac{-16}{56} )\\\\B=106.602\\\\B=106.6[/tex]

Answer:

$181.20

Step-by-step explanation:

6% of $3,020 is $3,020. I don't really know how to explain it but yeah lol.

Answer:

Your answer is 181.2

Step-by-step explanation:

the number 3020 is 100% (because it's the output value of the task)

If 3020 is 100%, so we can write it down as 3020=100%.

We know, that x is 6% of the output value, so we can write it down as x=6%.

Now we have two simple equations:

3020=100%

x=6%

3020/x=100%/6%

Now we just have to solve the simple equation, and we will get the solution we are looking for.

3020/x=100/6

(3020/x)*x=(100/6)*x       (we multiply both sides of the equation by x)

3020=16.666666666667*x       (we divide both sides of the equation by) (16.666666666667) to get x

3020/16.666666666667=x

181.2=x

x=181.2

hope this helps

Give Brainliest if you please

Answer:

smile mean laugh.

thank u

Answer:

The first option

Step-by-step explanation:

In the image, we can notice that NQ is longer than PQ, similar to how JH is longer than NJ. Thus, NQ must be aligned with JH and PQ with JN. As PN and HN are clearly the longest for each triangle, those must be aligned as well.

All of the responses have NP and NH aligned.

The last response does not have NQ aligned with JH.

The second and third do not align PQ and JN.

The first option is our answer.

Answer:

It's Positive

Step-by-step explanation:

Answer:

The amount of water he should pour in ounces(that is the only units the cup measures) is 16 + 4 = 20 ounces

Step-by-step explanation:

He is told to dissolve a medicine he has in 1 pint 4 ounces of water . He has a measuring cup marked in ounces .This means he can only measure the water quantity in ounces.

He definitely have to convert the pints to ounces.

1 pint = 16 ounces

Recall he has to dissolve the medicine in 1 pint 4 ounces of water.

Since 1 pint is equals to 16 ounces therefore, 16 ounces + 4 ounces  = 20 ounces.

The amount of water he should pour in ounces(that is the only units the cup measures) is 16 + 4 = 20 ounces

Answer:

The solutions are

x = -1, 1, -2√2, and 2√2.

Step-by-step explanation:

Given the equation

x^4 - 9x² + 8 = 0

Let u = x², then the equation becomes

u² - 9u + 8 = 0

u² - u - 8u + 8 = 0

(u² - u) - (8u - 8u) = 0

u(u - 1) - 8(u - 1) = 0

(u - 8)(u - 1) = 0

u - 8 = 0

=> u = 8

Or

u - 1 = 0

=> u = 1

For u = 8

=> x² = 8

=> x = ±√8 = ±2√2

For u = 1

=> x² = 1

=> x = ±√1 = ± 1

Answer:

B

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

In the graph, there are three lines , so that indicates that there are 3 proportional relationships

Answer: It is not long enough.

Step-by-step explanation:

Ok, we know that the "rule" for the distance between the base of the ladder and the wall is that, for each 4 ft that the ladder rises, we must have 1 foot between the base of the ladder and the wall.

then, for a 50 feet wall, the ladder must rise 50 ft, this means that the base of the ladder must be:

50ft/4 = 12.5 feet away from the wall.

Now, these two values can be thought as the cathetus of a triangle rectangle, and the ladder will be the hypotenuse, then we have (using Pythagoras theorem)

H = √(12.5ft^2 + 50ft^2) =  51.54 ft

So the theoretical safe value is bigger than the one we have, this means that the 51-foot ladder is not long enough.