Question

If a student average 9 math mistakes for every 30 math problems, how many problems will it take for them to make 45 mistakes? (Ps. I'm sure this isn't true of you!) Select one: a. 120 b. 55 C. 150 O d. 70​

Answer 1

To find out how many problems it will take for the student to make 45 mistakes, we can set up a proportion. 9 mistakes/30 problems = 45 mistakes/x problems. Solving for x, we get 150 problems. Therefore, the answer is C. 150 problems.

Answer 2

We can use proportions to solve the problem. If a student averages 9 math mistakes for every 30 math problems, then the ratio of mistakes to problems is 9:30 or 3:10.

To find out how many problems the student needs to do to make 45 mistakes, we can set up a proportion:

3/10 = 45/x

where x is the number of problems the student needs to do to make 45 mistakes.

Cross-multiplying, we get:

3x = 450

Dividing both sides by 3, we get:

x