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PSYCHO15rus [73]
3 years ago
11

The cost, c, of paper towels, based on the number of rolls, r, is given by this equation.

Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
4 0

Answer:

I think the cost for each roll is 1.29

Step-by-step explanation:

Hope this helps

Travka [436]3 years ago
4 0

\\ \sf\longmapsto c=1.29r

  • cost is 1$

\\ \sf\longmapsto 1=1.29r

\\ \sf\longmapsto r=\dfrac{1}{1.29}

\\ \sf\longmapsto r=0.7

  • Cost of 0.7 rolls is 1

Cost of 1 roll

\\ \sf\longmapsto \dfrac{1}{0.7}

\\ \sf\longmapsto \dfrac{10}{7}

\\ \sf\longmapsto 1.4\$

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julsineya [31]
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8 0
3 years ago
Students who attend Washington Middle School are either in seventh or eighth grade.
IgorLugansk [536]

Answer:

There are 1240 students at Washington middle school.  

Step-by-step explanation:

Percentages and Portions

We can find portions of a whole by correctly managing the percentages of each part. We know 25% of all students at Washington middle school were on the honor roll. From that portion, 60% of the students are seventh graders. That means 40% of the 25% are eight graders, i.e. 40*25%=10% were from eight grade.

We have 10% of all students are 124, thus the number of students are 124/10%=1240

There are 1240 students at Washington middle school.  

Let's test the answer. 25% of 1240 students are on the honor roll, which is 310 students. 40% of 310 students are from 8th grade, 40%*310 = 124 as stated in the problem

3 0
3 years ago
Jacob’s recipe calls for 4 7/8 cups of raisins. He has 6/11 of the amount that he needs.
boyakko [2]
If you would like to know how many cups of raisins does Jacob have, you can calculate this using the following steps:

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8 0
3 years ago
8x - 5 - 6 - 7 <br> Can someone solve this
Iteru [2.4K]

Answer:

8x-18

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
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Maurinko [17]
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and 
6 + 4 = 10


so its the last choice.
6 0
3 years ago
Read 2 more answers
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