Simplified:
kx + x² + 3k + 3x
10 floor tiles. if 2/5 are white, 1/2 are yellow, and 1/10 are brown, then first find the LCD(least common denominator which is 10) and would be 4/10+5/10+1/10 which gives 10 tiles out of 10 tiles
one Brian's item cost: x
one Chris' item cost: x+2.5
Set up equation:
Brians amount = Chris amount
4*x = 3*(x+2.5)
solve for x:
4x = 3x + 7.5
x = 7.5
Brian's items cost $7.5 each.
Check:
Brian paid 4*7.5 = $30
Chris paid 3*10 = $30
The individual cost of Brian's items was $7.50, and the indiv. cost of Chris' items was $10.
Answer:
2x^2+4x-30=0
Step-by-step explanation:
2x^2+10x-6x-30=0
2x(x+5)-6(x+5)=0
(2x-6)(x+5)=0
2x-6=0 x+5=0
x=6/2 x=-5
x=3
30 goes into 120 4 times.