# math

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jim has grades of 84, 65, 76 on three tests. what grade must he obtain on the next test to have an average of exactly 80% for all four tests?

• math -

84 + 65 + 76 = 225

0.8 * 400 = 320

320 - 225 = 95

• math -

( 84 + 65 + 76 + x ) / 4 = 80

84 + 65 + 76 + x = 4 * 80

225 + x = 320

x = 320 - 225 = 95

• math -

(65 + 84 + 76 + x ) / 4 = 80

(Balance the Equation)

225 + x = 320 [65 + 84 + 76 + x = 320]

(Balance the Equation)

x = 320 - 225 = 95

• algebra -

y=5x-3 y=-3x+13

• math -

The sum of two consecutive numbers is 37. What are they

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