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makkiz [27]
3 years ago
7

In a mathematics​ class 54, students received an A on the third​ test, which is ​150% of the students who received an A on the s

econd test. How many students received an A on the second​ test?
10,1 #16
Mathematics
1 answer:
Vilka [71]3 years ago
5 0

Answer:

Number of students who received A grade on the second test = 36

Step-by-step explanation:

Given that:

Number of students who received A grade on third test = 54

This is 150% of the students who received A on the second test.

Let,

x be the number of students who received A on the second test.

150% of x = 54

\frac{150}{100}x=54

1.5x=54

Dividing both sides by 1.5

\frac{1.5x}{1.5}=\frac{54}{1.5}\\x=36

Hence,

Number of students who received A grade on the second test = 36

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x = number of 1-cent stamps

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z = number of 12-cent stamps

We have 31 stamps all together, so x+y+z = 31.

"I have 4 more 1-cent stamps than 8-cent stamps" means we have the equation x = y+8. Whatever y is, add 8 to it to get x. Solve for y to get y = x-8.

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Your teacher made a typo somewhere because we should get a positive whole number result for x (since x is a count of how many 1-cent stamps we have).

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