Store A charges $3 per square foot for a wall to wall carpet plus $85 for installation. Store B charges $2/sq ft plus $100 for installation. Determine the square footage for which the total cost of the carpet and installation at each store is the same.
2007-02-14 23:52:46 · 4 answers · asked by jacquelyn b 1 in Education & Reference ➔ Homework Help
Area can be x sq ft
3x + 85 = 2x + 100
That's the equation from the paragraph - the amount that store A charges is the same as the amount that store B charges for x sq ft
Now solve for x
2007-02-14 23:56:31 · answer #1 · answered by Orinoco 7 · 1⤊ 0⤋
Basically what you need to do is put the information of Store A into one linear equation that fits y=mx+b, and put the information of Store B into another linear equation. Then, graph the two on an XY plane. The point of intersection where they cross is your answer.
2007-02-15 00:49:12 · answer #2 · answered by KBub 3 · 0⤊ 0⤋
31 ft at store a=118 9ft at store b=118
2007-02-15 00:04:23 · answer #3 · answered by retardedpolarbeer 1 · 0⤊ 0⤋
let area=x
3x+85=2x+100
x+85=100
x=15
15 square feet is the area where the price is the same.
2007-02-15 00:31:05 · answer #4 · answered by adriantheace 4 · 0⤊ 0⤋