H=height of ostrich
k=height of kiwi
h is 20 more than 4 times k
k=20+4k

k=108
108=20+4k
minus 20 from both sides
88=4k
divide both sides by 4
22=k

answer is A

5 0

4 years ago

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In order to set rates, an insurance company is trying to estimate the number of sick days that full-time workers at an auto repa

kotegsom [21]

Answer: 31

Step-by-step explanation:

Formula to find the sample size is given by :_

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where z*= critical value corresponds to confidence level.

$\sigma$ = population standard deviation.

E= Margin of error.

As per given , we have

$\sigma=2.8$

E=1

We know that critical value corresponding to 95% confidence level = z*=1.96

Then, the required sample size would be :

$n=(\dfrac{(1.96)\cdot (2.8)}{1})^2$

$n=(5.488)^2$

$n=30.118144\approx31$

Hence, the required minimum sample size = 31

3 0

4 years ago

I WILL GIVE BRAINLIEST

konstantin123 [22]

Is she making slime

8 0

3 years ago

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Use elimination to solve the system 4x + 7y = –14 and 8x + 5y = 8 for x. Round to the nearest tenth.

vesna_86 [32]

Answer:

x = 3.5

y = - 4

Step-by-step explanation:

2(4x + 7y = -14)

8x + 14y = -28

8x + 5y = 8

- (8x + 14y = -28)

--------------------------

- 9y = 36

y = 36/-9

y = - 4

4x + 7y = - 14

4x + 7(- 4) = - 14

4x -28 = - 14

4x = 14

x = 14/4

x = 3.5

5 0

3 years ago