ACT PREP - Averaging Grades to Pass Class

The video tutorial explains how to calculate the lowest grade a student needs on a fourth test to achieve an average of at least 80 across four tests in algebra. It begins by introducing the problem, then explains how to calculate an average. The tutorial sets up an equation to solve the problem, walks through the steps to solve it, and concludes by verifying the solution.

What is the main goal of the problem discussed in the video?

• To determine the lowest grade needed on the fourth test to average at least 80.

• To find the highest grade possible on the fourth test.

• To find the average of the first three tests.

• To calculate the total score of all four tests.

How is the unknown grade represented in the equation?

• As the number 80.

• As the letter Y.

• As the number 4.

• As the letter X.

What operation is used to find the average of the test scores?

• Subtraction followed by multiplication.

• Addition followed by division.

• Division followed by subtraction.

• Multiplication followed by addition.

What is the first step in solving the equation for the unknown grade?

• Divide the total by 4.

• Multiply both sides by 4.

• Add all known grades together.

• Subtract 244 from both sides.

What is the lowest grade the student can achieve on the fourth test to maintain an average of 80?

• 76

• 80

• 78

• 75