3 years ago

Please help me with these two problems

1 answer:

8 0

First pic ; they are complementary angles , so C !!

second pic ; both angles are supplementary angles !! as sum is 180° !!

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2. Which of these values is the GREATEST? 63/7 450% 8.99 -22

kogti [31]

I think it’s 450% I’m in 7th so what do I know ‍♀️

5 0

3 years ago

Please help with this

Arturiano [62]

Answer:

10x^2 -4x +6

Step-by-step explanation:

The area of the blue square is

2* 5x^2 = 10x^2

The area of the pink square is

2 * -2x = -4x

The area of the green square is

2 *3 = 6

Add it all together

10x^2 -4x +6

4 0

3 years ago

calculate the power of the pump which can lift 400kg of water to be stored in a water tank at a height of 19m and 40s (take g=10

iren [92.7K]

Hi, here it is !
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5 0

3 years ago

Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o

Juliette [100K]

Answer:

95% Confidence interval: (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

$\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)$

(31.32%,47.04%) is the required 95% confidence interval.

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3 years ago

What equation do you get when you solve ............. ky-bf=fy/m for y?

Xelga [282]

Idk use scientific val

5 0

3 years ago