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3 years ago

7

Mr. Plum's math class of 25 students had an average of 85 on a test. Miss Scarlett's class of 22 students had an average of 87 o

n the same test. What is the average of the two classes combined?

2 answers:

Monica [59]3 years ago

6 0

Use ((85x25)+(22x87))/ 47 for this to get the answer of about 86 (rounded)

maria [59]3 years ago

3 0

Add the two averages together and then divide it by 2. Thats your answer.

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Pedro simplified 4/7 * 8/5 ; his work is shown below. Identify where he made his error. Original division problem: 4/7 * 8/5 Ste

scoray [572]

I am not sure but I would say either step 2 or 4 but I am not 100% sure I hope you do well. Good Luck:)

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3 years ago

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Change each phrase into an algebraic expression

maks197457 [2]

Answer:

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2 years ago

A large manufacturing firm tests job applicants who recently graduated from college. The test scores are normally distributed wi

anzhelika [568]

Answer:

lowest score a college graduate must earn to qualify for a responsible position is 578

correct option is D. 578

Step-by-step explanation:

given data

mean = 500

standard deviation = 50

distribution = 6 %

to find out

What is the lowest score a college graduate must earn to qualify for a responsible position

solution

we know that here Probability P that is express as

P ( Z > x ) = 100% - 6% .....................1

so with the help of normal table

here value of Z is = 1.55 from cumulative probability 0.94

so by z score formula here x will be

x = z × standard deviation + mean ................2

so put here value

x = 1.55 × 50 + 500

x = 577.7387 ~ 578

so lowest score a college graduate must earn to qualify for a responsible position is 578

8 0

3 years ago

Write the missing exponent of 100=10 =

Ganezh [65]

Maybe 5 is the answer

4 0

3 years ago

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Solve the percent equation. 646 is what percent of 340?

ella [17]

646 is 190% of 340

Simply do the following,

1) divide,

$646 \div 340 = 1.9$

2) multiply the above answer by 100

$1.9 \times 100 = 190$

3) dock on that percent sign,

$190\%$

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I hope that helps you out!!

Any more questions, please just ask me!!

~ Zoey

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3 years ago