Plug in 0 for x. Plug in 0 for y.
Answer:
Yes.
Step-by-step explanation:
Substitute in the equation for x and y:
-8 = -3 + -5 = -8.
Answer:
x = 0
y = 5
z = -5.
Step-by-step explanation:
X-5y-z=-20
-2x-y-6z=25
-x-4y-z=-15
Add equation 1 and 3:
-9y - 2z = -35 .......... A
Multiply the first equation by 2:
2x - 10y - 2z = -40
Now add this to equation 2:
-11y -8z = -15.............B
Now multiply equation A by -4:
36y + 8x = 140.........C
Add equations B and C:
25y = 125
y = 5.
Substitute for y in equation A:
-9*5 - 2z = -35
2z = -45 + 35 = - 10
z = -5.
Now find x by substituting for y and z in the first equation:
x - 5(5) - (-5) = -20
x - 20 = -20
x = 0.
Answer:
95.45
Step-by-step explanation:
83% of 115 is 95.45
.83 × 115 = 95.45
if you wanted 83% of what is 115 then it would be 83% of 138.5542169 = 115
.83a = 115
115/.83 = a
115/.83 = 138.5542169
check:
.83 × 138.5542169 = 115
