Astudent missed 10 problems on a history test and received a grade of 17%. if all the problems were of equal value, how many problems were on the test?

12 problems

Step-by-step explanation:

All problems were of equal value

Let x be the number of problems in the test

We apply a rule of three

x  100%

(x-10) 17%

(x-10)*100%/(x)   = 17%

(x-10)/(x)   = 0.17

(x-10)   = 0.17*x

0.83*x = 10

x = 12.05

x = 12 problems

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt