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3 years ago

I don’t know this please help..

Mathematics

1 answer:

nekit [7.7K]3 years ago

5 0

Answer:

The surface area would be 28 square feet.

Step-by-step explanation:

To solve this, input the values for each of the variables every time you see it. l = length, w = width and h = height.

SA = 2lw + 2hw + 2hl

SA = 2(2)(1) + 2(4)(1) + 2(4)(2)

SA = 4 + 8 + 16

SA = 28

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A distribution has a mean of 90 and a standard deviation of 15. Samples of size 25 are drawn randomly from the population. Find

raketka [301]

Answer:

The probability is 0.04746

Step-by-step explanation:

Firstly, we calculate the z-score here

Mathematically;

z-score = x-mean/SD/√n

Where from the question;

x = 85, mean = 90 , SD = 15 and n = 25

Plugging these values into the equation, we have;

Z = (85-90)/15/√25 = -5/15/5 = -1.67

So the probability we want to calculate is ;

P(z > -1.67)

We use the standard normal distribution table for this;

P(z > -1.67) = 0.04746

4 0

3 years ago

DO I MULTIPLY (200 is 1/10) to get the correct answer of 2000 ?

Alexxx [7]

No that will equally 20.

Hope i helped :)

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3 years ago

. Write an equation that is perpendicular to y=2x – 1 and has y-intercept of -3

blagie [28]

The answer is very simple .

First you need to determine the slope, which is the reciprocal of the first line.

Then,

y = mx + b

m => -1/m

The perperdicular line has a new slope equal to m = -1/2

In the formula (y - y1) = m ( x - x1 ) + b , you should sustitude this value.

So the final equation will be

-3 = -1/2 (0) + b

b = - 3

y = (-1/2)x - 3

That is the solution

6 0

1 year ago

PLZZ HELP I NEED HELP

Mkey [24]

Step-by-step explanation:

1) let the number=x

six times a number=6x

Condition:

6x+4=22

2) eleven times a number=11x

Condition:

11x-5=50

3) 9 times a number=9x

Condition:

9x-7=-16

Note:if you need to ask any question please let me know.

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3 years ago

A jacket that has a regular price of $59 is on sale at a 35% discount. What is the sale price?

sammy [17]

Answer:

The price of the jacket will be $38.35

Step-by-step explanation:

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3 years ago