Wanda wants to have a test average of 90 her four science tests. On the first three tests, she got scores of 84, 96, and 85. What does she need on her last test to reach her goal?

Answer 1

84 + 96 + 85 = 265

400 * 0.9 = 360

360 - 265 = ?

Answer 2

84+96+85 + x = 4*90

Answer 3

95