Question

The questions in the first section on a test are worth 3 points and the questions in the second section are worth 5 points. Let x represent the number of correct questions from the first section, and let y represent the number of correct questions from the second section. Sydney earned more than 80 points on the test. The inequality representing her score is 3x + 5y > 80.

If Sydney answered 15 questions in the first section correctly, what is the minimum number of questions she must have answered correctly in the second section?

Answer 1

Sydney must have answered at least _______questions correctly in the second section of the test.

Answer 2

plug in 15 for x and solve for y

Answer 3

11.8

Answer 4

nope

Answer 5

y is a whole number

Answer 6

12 ?

Answer 7

nope

Answer 8

3(15) + 5y > 80

Answer 9

45 + 5y > 80

Answer 10

5y > 35

Answer 11

7

Answer 12

that's right

Answer 13

then i plug it in to find y

Answer 14

right ?

Answer 15

That was this step. 3(15) + 5y > 80. We just solved for y which is 7

Answer 16

oh ok thanks i thought i plug it in again

Answer 17

that's why i was confused but thanks :)

Answer 18

the answer was 8

Answer 19

y > 7

Answer 20

remember > means greater but not equal to

Answer 21

so if it's greater and not equal to 7, the minimum must be 8