diontna29 diontna29

23-11-2018
Mathematics

contestada

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

Respuesta :

jimrgrant1 jimrgrant1

23-11-2018

B

substitute b = 7 into the expression and evaluate

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

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