You are taking a math course in which there will be four tests each worth 100 pts. You have scores of 99, 94, & 90 on the first three tests. You must make a total of 360 in order to get an A. What scores on the last test will give you an A?
99 + 94 + 90 = 283
360 - 283 = 77 = score needed
To find out the scores you need to achieve on the last test to get an A in the course, we can use the equation:
(99 + 94 + 90 + x) / 4 = 360
Here, "x" represents the score you need to get on the last test.
To solve this equation, we can follow these steps:
1. Multiply both sides of the equation by 4 to eliminate the denominator:
99 + 94 + 90 + x = 360 * 4
2. Simplify the equation by adding the known scores:
283 + x = 1440
3. Subtract 283 from both sides of the equation to isolate "x":
x = 1440 - 283
4. Calculate the value of "x":
x = 1157
Therefore, in order to get an A in the course, you need to score at least 1157 on the last test.