Substituindo x por -7 na expressão algébrica do item a) obtemos o valor numérico: a) 21
b) - 21
c) - 7
d) - 16
e) 16

Resultado:

d) - 16

Processo:

3 × -7 = -21

-21 + 5 = -16

Boa sorte :)

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had