Astudent missed
15 problems on a chemistry test and received a grade of
52 %. if all the problems were of equal value, how many problems were on the test? round off your answer to the nearest integer.

x = 31

Step-by-step explanation:

Let x: total amount of questions in the Chemistry test.

Then 52% represents the ratio of questions properly answered vs total questions:

The number of correct questions is the number of total questions take the number of missed questions.

Since, missed questions = 15

Also, 52% can be expressed as 0.52. Then, the expression can be rewritten as:

Then, rearranging:

Rounding to the nearest unit: x = 31

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)