If the value of b is 7, then what is the value of the expression -3b2 + 25 = ? A. 17 B. –122 C. 122 D. 172. −3(7)2+25−3×49+25−147+25−122 B.-122

asked Jun 23, 2019 152k views

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If the value of b is 7, then what is the value of the expression -3b2 + 25 = ?

A. 17 B. –122 C. 122 D. 172. −3(7)2+25−3×49+25−147+25−122
B.-122

by Ywat

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substitute b = 7 into the expression and evaluate

- 3 × (7)² + 25 = (- 3 × 49 ) + 25 = - 147 + 25 = - 122 → B

Joesdiner answered Jun 28, 2019

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