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Katen [24]
3 years ago
9

I need help with this last problem please

Mathematics
2 answers:
igomit [66]3 years ago
5 0

Answer:

25

Step-by-step explanation:

12+13=25 so 25x5=125 and 125 divide 5=25

fredd [130]3 years ago
5 0

I'm on computer so examples will look weird so I will label them.

Answer:

Your answer will be 25.

Step-by-step explanation:

1. You will rewrite the division as a fraction

Ex:    5 × (12+13)

     ____________

               5

2. Cancel the common factor which is 5 so you will cross out the 5's

3. Then you would divide the (12+13) by 1

4. Finally you would add the 12 and the 13 to get 15.

I hope this helps.   :  )

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Answer:

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Step-by-step explanation:

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or

5/12

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qwelly [4]

Answer:

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Step-by-step explanation:

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3 years ago
15. Before oil is added to a certain road surface material, the other ingredients are mixed. The mixture contains
mojhsa [17]

Answer:

sand = 3450 pounds

3/4 inch stones =6750 pounds

1 inch stones =4800 pounds.

Step-by-step explanation:

The mixture composition is :

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32% inch stones and

sand for balance

The percent here is by mass of material used.

Weight of mixture is 15,000 pounds before oil addition.

Use the percent by weight for the two types of stones and calculate real values in pounds

Formula to apply is:

Mass percent = (mass of a material/ total mass of mixture) * 100

For 3/4 inch stones it will be:

0.45= \frac{x}{15000} *100\\\\0.45=\frac{x}{150} \\0.45*150=x\\x=6750

The 3/4 inch stones weigh 6750 pounds

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The 1 inch stones weigh = 4800 pounds

Total for the two items : 4800+6750 =11550 pounds

The sand used weighs : 15000 - 11550 = 3450 pounds

8 0
3 years ago
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