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viva [34]
2 years ago
12

Do anyone know how to do this

Mathematics
2 answers:
Alex_Xolod [135]2 years ago
8 0
I have the same book what page is it
Roman55 [17]2 years ago
3 0
You use the formula bxwxh I believe
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The Lewis family and the Martin family each used their sprinklers last summer. The water output rate for the Lewis family's spri
MrRa [10]

Answer:

Martin family: 20 hours

Lewis family: 35 hours

Step-by-step explanation:

Let's say that the Lewis family sprinklers were out for L hours and the Martin family's sprinklers were out for M hours. We know that for each hour that the Lewis family sprinkler was on, 30L of water was put out. We can thus write the Lewis family sprinkler water output as 30L per each hour of L = 30 * L. Similarly, the Martin family sprinkler water output = 15 * M .

We know that the total hours for the sprinklers is 55, so L + M = 55. The total water output for the sprinklers is the sum of the sprinkler outputs, so 30 * L + 15 * M = 1350

L + M = 55

30 * L + 15 * M = 1350

One way to solve this would be to solve for L in the first equation and substitute that into the second

subtract M from both sides in the second equation

55 - M = L

30 * (55-M) + 15 * M = 1350

30 * 55 - 30 * M + 15 * M = 1350

1650 - 15M = 1350

subtract 1650 from both sides to isolate the M and its coefficient

-15M = -300

divide both sides by -15 to isolate M

M = 20

L = 55-20 = 35

6 0
3 years ago
How to solve 4+7*-5*-6
Fantom [35]

4 + 7 * -5 * -6

7 * -5 = -35

4 + -35 * -6

-35 * -6 = 210

4 + 210 = 214

4 + 7 * -5 * -6 = 214

4 0
3 years ago
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How to find the volume of L blocks?
choli [55]
 <span>Volume = L * W * H cubic units 

Surface Area = 2 * (LW + LH + WH) square units</span>
5 0
3 years ago
If you had 11 dollars and spent 7 what fraction of the money did you spend
tatyana61 [14]

Answer:

7/11

Step-by-step explanation:

3 0
2 years ago
Round 5,685 to the nearest 100
zloy xaker [14]

Hi. Your answer is 5,700 because 685 is closer to 700 than 600. Please ask if you have any more questions. Also please mark as the brainliest answer!

3 0
3 years ago
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