3 years ago

Christel wants to know what the most popular color at her school is. She surveys 5 boys and 5 girls from each class.

Mathematics

2 answers:

miskamm [114]3 years ago

6 0

The survey will Representative of the colors.

Mice21 [21]3 years ago

3 0

Answer:

It would be representative

Step-by-step explanation:

It is that because she wanna what color everyone likes

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George buys some first class and second class stamps to put on some letters. Each first class stamp costs 67p, and each second c

Dafna1 [17]

Answer:

£191.36

Step-by-step explanation:

Sum the parts of the ratio, 1 + 4 = 5 parts

Divide 320 by 5 to find the value of one part of the ratio.

320 ÷ 5 = 64 ← value of 1 part of the ratio , thus

4 parts = 4 × 64 = 256

Thus he bought 64 first class and 256 second class.

Cost = (64 × £0.67) + (256 × £0.58)

= £42.88 + 148.48

= £191.36

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3 years ago

(6p-6/p)•((9p^2)/2p-2)

Alekssandra [29.7K]

Answer:

27p4-27p2-12p+12/p

Step-by-step explanation:

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3 years ago

A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.

Crank

Answer: 1.25

Step-by-step explanation:

Given: A college-entrance exam is designed so that scores are normally distributed with a mean $(\mu)$ = 500 and a standard deviation $(\sigma)$ = 100.

A z-score measures how many standard deviations a given measurement deviates from the mean.

Let Y be a random variable that denotes the scores in the exam.

Formula for z-score = $\dfrac{Y-\mu}{\sigma}$

Z-score = $\dfrac{625-500}{100}$

⇒ Z-score = $\dfrac{125}{100}$

⇒Z-score =1.25

Therefore , the required z-score = 1.25

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3 years ago

Can you plz smile for me?

klio [65]

Answer:

°u°

Step-by-step Explanation

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2 years ago

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Carmen received an $80 gift card for a coffee store. She used it in buying some coffee that cost $7.74 per pound. After buying t

vampirchik [111]

First find out how much money she spent by doing 80 (original amount) - 33.56 (amount after spending): $46.44
Now she spent 46.44 dollars and each pound is 7.74:
46.44 / 7.74 = 6
She bought 6 lbs

7 0

3 years ago