cost of pencil = x = 0.07
and cost of eraser = y = 0.03
Step-by-step explanation:
let cost of pencil = x
and cost of eraser = y
So, we have equations:

Solving both equations to find value of x and y
Let:

Multiply eq(1) with 4 and eq(2) with 3 and subtract

Putting value of x in equation 1:

So, x= 0.07 and y = 0.03
cost of pencil = x = 0.07
and cost of eraser = y = 0.03
Keywords: System of equations
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7 is the right answer your looking for.
Answer:
that means you need to find the surface area, but not the part that is touching the ground or the bottom.
Answer:
9/5 (-8) > = F > = 9/5 (157)
Step-by-step explanation:
A. -40>= 5/9F - 32
-40+32>= 5/9F
9/5(-8) >= F
B. 125 <= 5/9F - 32
125+32 <= 5/9F
9/5(157) <= F
9/5 (-8) >= F >= 9/5 (157)