I need help is it A B C or D

A student must leave for campus in 10 mins or he will be late for class. Unfortunately he is snowed in. He can shovel the drivew

Leno4ka [110]

Since if he gets the driveway done in 20 minutes he gets 1/20th of the driveway done in 1 minute (if x=20 then x/20=1 by dividing both sides by 20) and if his brother gets 1/12th of the driveway done in one minute, then if t represents the time it takes to shovel the driveway, t/20+t/12=1 driveway shoveled as 1/20+1/12=amount they can do in 1 minute, so t/20+t/12 is how much they can do in t minutes. Multiplying both sides by 20*12=240, we get 12t+20t=32t=240. Dividing both sides by 32, we get 240/32=7.5 minutes to shovel the driveway.

7 0

3 years ago

Rachel harvested half as many watermelons as strawberries. If there ere 28 watermelons, how many strawberries did she get?

iren [92.7K]

Answer:

its 28

Step-by-step explanation:

8 0

3 years ago

Please help me answer questions 48 and 48 with the working out please. This is very urgent and i’m giving out 8 points not 5!!!

mariarad [96]

Answer: 65°

<u>Step-by-step explanation:</u>

$E=w(t_f-t_o)\\\\E: 10\ cubic\ feet\times \dfrac{1000\ BTU}{1\ cubic\ foot}\times \ 60\%\quad \rightarrow \quad E=6000\ BTU\\\\\\w:50\ gallons\times \dfrac{8\ pounds}{1\ gallon}\quad \rightarrow \quad w=400\ pounds\\\\\\\\E=w(t_f-t_o)\\\\6000=400(t_f-50)\\\\\dfrac{6000}{400}=\dfrac{400(t_f-50)}{400}\\\\.\quad 15=t_f-50\\\\\\.\quad 15=t_f-50\\.\ \underline{+50}\quad \underline{\quad \ +50}\\.\quad 65=t_f$

4 0

3 years ago

Simplify. Can you explain it also?

Doss [256]

Answer:

The answer is

Step-by-step explanation:

To solve the fraction reduce the fraction with d

That's we have

Next simplify the expression using the rules of indices to simplify the letters in the fraction

<u>For c </u>

Since they are dividing we subtract the exponents

We have

<u>For </u><u>e</u>

Substituting them into the expression we have

Reduce the fraction by 3

We have the final answer as

Hope this helps you

8 0

3 years ago

What will the equation be if mowing need help. I need my lawn mowed every week from June through the middle of July. I will pay

sergij07 [2.7K]

So for the first week of june, say week 1, you have to pay then 35(1), 2nd week is 35(2), week 3 is 35(3) and week "w" say, is 35(w).

$\bf \stackrel{payment}{p}=35\stackrel{weeks}{w}\implies p=35w\qquad 1\le x\le 7$

3 0

3 years ago