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3 years ago

What is the average of 2.34, -2/7, -0.45, and 3/8

Mathematics

1 answer:

Elodia [21]3 years ago

6 0

Answer: 0.49375, or 0.5

Step-by-step explanation: add up 2.34, -0.29, -0.45, and 0.38, which equals 1.975, then divide that by four (since there are 4 numbers) and you get 0.49375

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(7 + X) x 8 - 4 x X = 56

devlian [24]

Answer:

12 1/4

Step-by-step explanation:

(7 + X) × 8 - 4 × X = 56

7 + X × 8 - 4 × X = 56

7 + 8X - 4 × X = 56

7 + 8X - 4X = 56

7 + 4X = 56

4X = 56 - 7

X = 49/4

X = 12 1/4

7 0

3 years ago

The area of a square is 8 square meters. which of these is closest to the length of one side of the square?''

sveticcg [70]

I hope this helps you

3 0

3 years ago

Read 2 more answers

stat: sample of 780 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 99% conf

Anettt [7]

Answer: 554

Step-by-step explanation:

If prior population proportion is known, then the formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

As per given description, we have

p= 0.1

E=0.025

Critical z-value for 95% confidence : $z_{\alpha/2}=1.96$

Then,

$n=0.1(1-0.1)(\dfrac{1.96}{0.025})^2=553.1904\approx554$

Hence, the minimum sample size required = 554.

7 0

3 years ago

I NEED HELP FAST PLEASE

Stells [14]

Answer:

The second and fourth option

Step-by-step explanation:

In order for two lines to be perpendicular they must intercept each other and their slope must be the opposite inverse; ex: $\frac{-1}{4}$ the negative inverse is 4 (multiplying by -1 and flipping the fraction)

8 0

2 years ago

Which way is better?

Liono4ka [1.6K]

Answer:

the best way is to follow the law, sales tax is not subject to discount by the seller.

Step-by-step explanation:

both ways result in the same outcome:

improper way, discount after tax

$50+$5(tax)=$55, after discount $55-$11(20%)=$44

proper way, discount before tax

$50-$10(20%)=$40+$4(tax)=$44

3 0

3 years ago