2 years ago

HELP THIS IS MY LAST QUESTION. PLEASE

Mathematics

1 answer:

Jlenok [28]2 years ago

4 0

Answer:

Step-by-step explanation:

true po yannnnnnnnnnnnnnnnnn

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Gallon of gas cost 4$ carols car can drive 20 miles per gallon. what is the cost to drive 30 miles

almond37 [142]

Answer: It costs $6 to drive 30 miles.

Step-by-step explanation:

$4 per 20 miles

20/4 = 5

1$ per 5 miles

30/5 = 6

6 * 5 = 30

3 0

3 years ago

Find the surface area

zalisa [80]

Answer:

Step-by-step explanation:

15 + 15 + 12 + 12 + 18 gives you 72 you add all the areas

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3 years ago

The mean of five numbers is 8. when another number is added the mean is 7. find the number added

sasho [114]

Answer:

$\large \boxed{\sf \ \ 2 \ \ }$

Step-by-step explanation:

Hello,

<u>The mean of five numbers is 8</u> so we can write

$\dfrac{x_1+x_2+x_3+x_4+x_5}{5}=8$

<u>When another number is added the mean is 7</u>, let s note x the another number we can write

$\dfrac{x_1+x_2+x_3+x_4+x_5+x}{6}=7$

From the first equation we can say

$x_1+x_2+x_3+x_4+x_5=8*5=40$

So the second equation becomes

$\dfrac{x_1+x_2+x_3+x_4+x_5+x}{6}=7\\\\ \dfrac{40+x}{6}=7\\\\40 + x = 6*7=42\\\\ x = 42-40 = 2\\$

The solution is then 2

Hope this helps

4 0

2 years ago

A software company keeps a ratio of 2.5 testers to every 10 software developers. If the company hires 20 developer in one year,

pochemuha

Answer:

They will need to hire 5 testers.

Step-by-step explanation:

This question can be solved using a simple rule of three.

For each 10 developers, we need 2.5 testers. So how many testers are needed for 20 developers?

10 developers - 2.5 testers

20 developers - x testes

$10x = 20*2.5$

$10x = 50$

$x = \frac{50}{10}$

$x = 5$

They will need to hire 5 testers.

6 0

3 years ago

Read 2 more answers

A dollar bill is 6.14 inches long, 2.61 inches wide, and 0.0043 inches thick. If you laid 1 million dollar bills end to end, how

navik [9.2K]

The answer would be 97 when rounded to the nearest mile (if you were were going for length)

4 0

3 years ago