X + 2y = 8
x = -2y + 8....so we sub -2y + 8 for x in the other equation
2x + y = 7
2(-2y + 8) + y = 7
-4y + 16 + y = 7
-3y = 7 - 16
-3y = - 9
y = -9/-3
y = 3
x = -2y + 8
x = -2(3) + 8
x = -6 + 8
x = 2
solution is (2,3)
Answer:
9y+y = y(9 + 1) = 10y
answer is 10y
if 9y^2 then it should be 9y times y = 9y^2
hope it helps
Step-by-step explanation:
9y+y is the same as 9y+1y
9y2 same as 9y*y
9y+y simplifies to 10y
Answer:
The cost of the 7.5 lbs of walnuts be $2.16 .
Step-by-step explanation:
As given
It costs $3.45 to buy lb of chopped walnuts.
i.e
Now calculate the cost of one pound .
Now calculated the cost of the 7.5 lbs of walnuts .
Cost of 7.5 lbs of walnuts = 7.5 × 0.2875
= $2.16 (Approx)
Therefore the cost of the 7.5 lbs of walnuts be $2.16 .
Answer:
2
Step-by-step explanation:
2*2*2 is 8