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3 years ago

What operation should be performed first to solve this problem?

Mathematics

2 answers:

Keith_Richards [23]3 years ago

8 0

The answer is...
D)Multiplication

snow_lady [41]3 years ago

4 0

Yes It's D, MULTIPLICATION thank you very much.

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Eduardwww [97]

Answer:

400%

Step-by-step explanation:

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3 years ago

A large city newspaper periodically reports the mean cost of dinner for two people at restaurants in the city. The newspaper sta

inysia [295]

Answer: C) 133

Step-by-step explanation:

The formula to find the sample size is given by :-

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

, where z* = Critical z-value

$\sigma$ = Population standard deviation for prior study.

E= Margin of error.

As per given , we have

$\sigma=$35$

E= 5

The critical z-value for 90% confidence level is 1.645.

Substitute al;l the value sin the above formula , we get

$n=(\dfrac{1.645\times 35}{5})^2$

$n=(\dfrac{57.575}{5})^2$

$n=(11.515)^2$

$n=132.595225\approx133$

Hence, the minimum sample size needed is 133.

Thus , the correct answer is : C) 133

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3 years ago

I need help on this 4

Virty [35]

Answer:

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free shipping

8 0

2 years ago

Read 2 more answers

Triangles PIC Included

ZanzabumX [31]

Answer:

sin70° = x/6

Step-by-step explanation:

When we draw out our picture and triangle, we should see that our angle is on the ground 70°, the height x is across from the angle and is the vertical leg up, and that our hypotenuse is equal to 6:

sin70° = x/6

6 0

3 years ago

Read 2 more answers

Solve this rational equation <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7Bx%20%2B%204%7D%20%20%3D%20%20%5Cfrac%7B4%7

sergey [27]

Answer:

$x = - 12$

C.E.: x =/= -4

Step-by-step explanation:

$\frac{x}{x + 4} = \frac{4}{x + 4} + 2 \\ \frac{x}{x + 4} = \frac{4 + 2x + 8}{x + 4} \\ x = 4 + 2x + 8 \\ - x = 12 \\ x = - 12$

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2 years ago