Respuesta :

Answer:

the expression is equal to 31

Step-by-step explanation:

  • 3x-y2
  • 3(7) - (-5)2
  • 21 - (-10)
  • 21 + 10 = 31
PurpleFlame10

Answer:

31

Step-by-step explanation:

Substitute x and y into the equation to get..

(3×7)-(-5×2)

21- -10

31

Hope this helps :)