To find out what Sam needs to score on her fourth test, we first need to determine what her total score needs to be for all four tests to average 90%.

Step 1: Multiply the desired average (90%) by the number of tests (4).
90 * 4 = 360

This means Sam needs a total of 360 points across all four tests to average 90%.

Step 2: Add up Sam's scores from the first three tests. The question doesn't provide these scores, but let's assume they are 85, 95, and 88 for example.
85 + 95 + 88 = 268

Step 3: Subtract the total of Sam's first three test scores from the total she needs to average 90%.
360 - 268 = 92

So, Sam needs to score 92 on her fourth test to average 90% across all four tests.

Question

To find out what Sam needs to score on her fourth test, we first need to determine what her total score needs to be for all four tests to average 90%.

Step 1: Multiply the desired average (90%) by the number of tests (4). 
90 * 4 = 360

This means Sam needs a total of 360 points across all four tests to average 90%.

Step 2: Add up Sam's scores from the first three tests. The question doesn't provide these scores, but let's assume they are 85, 95, and 88 for example. 
85 + 95 + 88 = 268

Step 3: Subtract the total of Sam's first three test scores from the total she needs to average 90%. 
360 - 268 = 92

So, Sam needs to score 92 on her fourth test to average 90% across all four tests.

Knowee AI · Accepted Answer

To find out what Sam needs to score on her fourth test, we first need to determine what her total score needs to be for all four tests to average 90%.

Step 1: Multiply the desired average (90%) by the number of tests (4). 
90 * 4 = 360

This means Sam needs a total of 360 points across all four tests to average 90%.

Step 2: Add up Sam's scores from the first three tests. The question doesn't provide these scores, but let's assume they are 85, 95, and 88 for example. 
85 + 95 + 88 = 268

Step 3: Subtract the total of Sam's first three test scores from the total she needs to average 90%. 
360 - 268 = 92

So, Sam needs to score 92 on her fourth test to average 90% across all four tests.

Sam will take four science tests this quarter. Her scores on three of the tests are shown below.What does Sam need to score on the fourth test to ensure that she will have an average of 90% for all four tests?

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