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2 years ago

11

Lucy is training for a long distance race. She runs 5/8 of a kilometre every day during her first week of training. How many kil

ometres did she run during her first week?

2 answers:

zubka84 [21]2 years ago

8 0

This is what I found sorry if it’s wrong

Vadim26 [7]2 years ago

4 0

Answer:

here is the pic you wanted

Step-by-step explanation:

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Volgvan

Use rise over run to find slope. If you don't know what that is, its y2-y1/x2-x1. Y2 is 125, Y1 is 25, X2 is 5, and X1 is 1. You then plug the numbers in, 125-25=100. 5-1=4. then you divide 100/4, in which you get 25. So you times 25 by 3, getting 75.

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3 years ago

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3 years ago

Nicole is half as old as Donald. The sum of their ages is 72. <br><br> How old is Nicole, in years?

bixtya [17]

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3 years ago

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3 years ago

How much water must be evaporated from 130 gallons of a 9% acid solution to make a 12% acid solution?

Bad White [126]

Answer: 33 gallons

Step-by-step explanation:

We initially have 130 gallons of a $9\%$ acid solution and we need to change it to a $12\%$ acid solution, and for that it is necessary to evaporate $n$ gallons of water.

So, this situation can be mathemtically expressed as follows:

$(130)(9\%)=(130-n)(12\%)$

Then:

$(130)(\frac{9}{100})=(130-n)(1\frac{12}{100})$

Isolating $n$ :

$11.7=15.6-0.12 n$

$n=32.5 \approx 33$

Hence, we need to evaporate 33 gallons of water.

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3 years ago