PSAT Math Grid-Ins Question 45: Answer and Explanation
Question: 45
If 
, what is the value of 9x + 10y ?
Correct Answer: 144
Explanation:
144
Difficulty: Easy
Category: Heart of Algebra/Linear Equations
Getting to the Answer: There is only one equation given and it has two variables. This means that you don't have enough information to solve for either variable. Instead, look for the relationship between the left side of the equation and the other expression that you are trying to find. Start by clearing the fractions by multiplying both sides of the original equation by 12. This yields the expression that you are looking for, 9 x + 10 y, so no further work is required—just read the value on the right-hand side of the equation:
Test Information
- Use your browser's back button to return to your test results.
- Do more Math Grid-Ins Tests tests.
More Tests
- PSAT Math Grid-Ins Test 1
- PSAT Math Grid-Ins Test 2
- PSAT Math Grid-Ins Test 3
- PSAT Math Grid-Ins Test 4
- PSAT Math Grid-Ins Test 5
- PSAT Math Grid-Ins Test 6
- PSAT Math Grid-Ins Test 7
- PSAT Math Grid-Ins Test 8
- PSAT Math Grid-Ins Test 9
- PSAT Math Grid-Ins Test 10
- PSAT Math Grid-Ins Test 11
- PSAT Math Grid-Ins Test 12