Algebra
posted by Pam .
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
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