Answer:
desculpa mas eu não sei a resposta mais eu vou ver se posso te ajudar taaa
Answer:
the third one
Step-by-step explanation:
8x + 40 ≥ 0
8x ≥ -40
x ≥ -5
Answer:
x=7
y=11
z=7
Step-by-step explanation:
x + y + z = 25
y+z= 18
Z= 7
Substitute the third equation into the second
y+z=18
y+7 = 18
y = 18-7
y = 11
Now substitute y=11 and z=7 into the first
x +y+z = 25
x+11+7 = 25
x+18 = 25
x = 25-18
x=7
