Answer:
USE GOOGLE BEFORE COMING HERE
Step-by-step explanation:
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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Answer:it goes up by 2 so it would be 3+2 is 5 5+2=7 and so on
Step-by-step explanation:
Answer:

Step-by-step explanation:
1) Remove parentheses.

2) Regroup terms.

I'm guessing the answer is B? I tried to isolate r and I got that result. Sorry if it's wrong!