Respuesta :

Answer:

a. -6

b. 3

c. 1

Step-by-step explanation:

a. 4(-5)+7(2)

-20+14= -6

b. 2(5-9)-(-3-8)

2(-4)-(-11)=

(-8)-(-11)=

(-8)+11= 3

c. (-7)²+10(-5)

49+(-50)= 1