Answer:
see explanation
Step-by-step explanation:
pqr = - 1 × 5 × - 4 = - 5 × - 4 = 20
-5(a - b) = - 5(4 - (- 6)) = -5(4 + 6) = - 5 × 10 = - 50
5s² + st = 5 × (- 3)² + (- 3 × - 7) = (5 × 9) + 21 = 45 + 21 = 66
5c - de = (5 ×- 4) - (5 × - 3) = - 20 - (- 15) = - 20 + 15 = - 5
p² + 3q² = (- 10)² + (3 × (- 2)²) = 100 + (3 × 4) = 100 + 12 = 112
[tex]\frac{mn}{2p}[/tex] = [tex]\frac{(-40)(24)}{2(-3)}[/tex] = [tex]\frac{-960}{-6}[/tex] = 160
[tex]\frac{b^2c}{ad^2}[/tex] = [tex]\frac{(-8)^2(9)}{-3(-2)^2}[/tex] = [tex]\frac{64(9)}{-3(4)}[/tex] = [tex]\frac{576}{-12}[/tex] = - 48
