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3 years ago

sam and jesse each wash 5 cars an hour. they both work for 7 hours over 2 days. how many cars did Sam and Jesse wash?

Mathematics

1 answer:

emmainna [20.7K]3 years ago

3 0

Just do how many minutes are in a hour and do that for 2days but 24 times two

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Okay I know I suck at math and I really don't understand math that well so can you help me on this??? Thank you!

Alja [10]

W - width
l - length
p - perimeter

The perimeter is 72 cm (p=72).
The length is twice the width (l=2w).
The formula for perimeter is 2w+2l=P.

$p=72 \\
l=2w \\ \\
2w+2l=p \\
2w+2 \cdot 2w=72 \\
2w+4w=72 \\
6w=72 \\
w=12 \\ \\
l=2w=2 \cdot 12 =24$

Check the answer:
$2 \cdot 12 + 2 \cdot 24 \stackrel{?}{=} 72 \\
24+48 \stackrel{?}{=} 72 \\
72 \stackrel{?}{=} 72 \\ \hbox{true}$

The length of the photo is 24 cm, the width of the photo is 12 cm.

8 0

3 years ago

An individual is planning a trip to a baseball game for 16 people. Of the people planning to go to the baseball game, 8 can go o

Sedaia [141]

Answer: There are 4 people who only go to the game on Saturday.

Step-by-step explanation:

Let the number of people go on Saturday be n(A).

Let the number of people go on Sunday be n(B).

Since we have given that

n(A) = 8

n(B) = 12

n(A∪B) = 16

According to rules, we get that

$n(A)+n(B)-n(A\cap B)=n(A\cup B)\\\\8+12-n(A\cap B)=16\\\\20-n(A\cap B)=16\\\\n(A\cap B)=20-16=4$

So, n(only go on Saturday) = n(only A) = n(A) - n(A∩B) = 8-4 = 4

Hence, there are 4 people who only go to the game on Saturday.

4 0

3 years ago

11x - 2x + 15 = 8 + 7 + 9x<br> Help please

sergey [27]

Answer:

15 it's in the equation

Step-by-step explanation:

11x-2x=9x 9x-9x=0

7+8=15

8 0

3 years ago

Read 2 more answers

Sorry theres 3 more after this its all urgent

faust18 [17]

Answer:

Step-by-step explanation:

I just took the quiz

6 0

3 years ago

What's the answer for this equation 1/3(y+7)=3(y−1)

Dominik [7]

Answer: -(3y*3(y+7)+1=0

6 0

2 years ago