<span>15x + 35y - 40 z = 5 (3x + 7y -8z)
hope that helps
............................</span>
Answer:
-12
Step-by-step explanation:
z+z+z
-4+-4+-4
-8+-4
-12
Answer:
(Since 3.14 seems more reliable, I'll use that for all four instead)
A: 17.6 ft
B: 81.6 mm
C: 9 cm
D: 12 in
Step-by-step explanation:
A:

B:

C:

D:

I'm really sorry, I'm not the best at this, but I did all the equations the best to my knowledge and came up with these 3 answers
(2,-1) which equaled -7
(5,4) which equaled -11
and (0,-9) which equaled - 9
Again I'm really sorry if this didn't work. :( God bless and good luck with future lessons.