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defon
2 years ago
6

Pls help :( I’m so stuck in this

Mathematics
2 answers:
hodyreva [135]2 years ago
8 0

Answer:

  • 99.6 ft²

Step-by-step explanation:

<u>Three faces are equal triangles with:</u>

  • base = 8 units, height = 6 ft

<u>The base is a triangle with:</u>

  • base = 8 ft, height = 6.9 ft

<u>Surface area is sum of areas of 4 faces:</u>

  • S = 3*(1/2*8*6) + 1/2*8*6.9 = 99.6 ft²
uranmaximum [27]2 years ago
5 0

Answer:

99.6 ft²

Step-by-step explanation:

Three faces are equal triangles with:

base = 8 units, height = 6 ft

The base is a triangle with:

Step-by-step explanation:

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A function follows the rule y = -75 - 5 x . When the function's output is 25, the equation is 25 = -75 - 5 x .
zhenek [66]

Answer:

same here idek tbh

Step-by-step explanation:

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3 years ago
A researcher working in a Human Resources department was interested in gender and sales figures so he conducted a t-test. The me
irina1246 [14]

Answer:

d = \frac{78.24 -66.25}{\sqrt{\frac{7^2 +7^2}{2}}}= 1.713

For the interpretation we consider a value for d small is is between 0-0.2, medium if is between 0.2-0.8 and large if is higher than 0.8.

And on this case 1.713>0.8 so we have a large effect size

This value of d=1.713 are telling to us that the two groups differ by 1.713 standard deviation and we will have a significant difference between the two means.

Step-by-step explanation:

Previous concepts

The Effect size is a "quantitative measure of the magnitude of the experimenter effect. "

The Cohen's d effect size is given by  the following formula:

d = \frac{\bar X_1 -\bar X_2}{\sqrt{\frac{s^2_1 +s^2_2}{2}}}

Solution to the problem

And for this case we can assume:

\bar X_1 =78.24 the mean for females

\bar X_2 =66.25 the mean for males

s_1 = s_2= 7 represent the deviations for both groups

And if we replace we got:

d = \frac{78.24 -66.25}{\sqrt{\frac{7^2 +7^2}{2}}}= 1.713

For the interpretation we consider a value for d small is is between 0-0.2, medium if is between 0.2-0.8 and large if is higher than 0.8.

And on this case 1.713>0.8 so we have a large effect size

This value of d=1.713 are telling to us that the two groups differ by 1.713 standard deviation and we will have a significant difference between the two means.

4 0
2 years ago
Simply the expression 2(10)+2(x+4)
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Step-by-step explanation:

2(10)+2(x+4)

20 + 2x + 8

20 +8 +2x

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5 0
2 years ago
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Will give brainliest if you get this right!
SSSSS [86.1K]

The answer is x=6. I double checked the work and am 100% sure thats the answer

7 0
2 years ago
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What is the solution of the following equation? 2x-5+3x=35
harina [27]

<em>2x - 5 + 3x = 35 </em>

<em>simplify </em>

<em>5x - 5 = 35 </em>

<em>add 5 to both sides </em>

<em>5x - 5 + 5 = 35 + 5 </em>

<em>simplify </em>

<em>5x = 40 </em>

<em>divide both sides by 5 </em>

<em>5x/5 = 40/5 </em>

<em>simplify </em>

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<em> </em>

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5 0
3 years ago
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