Answer:
i dont
Step-by-step explanation:
know i answerd because i need points
Answer:
she is 13
Step-by-step explanation:
her brother is 7.
13+7=20
Answer:
This question doesn't have a solution
Step-by-step explanation:
5x+2y=12 5x+2y=12
5x-2y=28 5(4)+2y=12
2y=12-20
10x=40 2y=-8
x=40/10 y=-8/2
x=4 y=-4
2x^2 - 2x - 40 = 2x^2 -10x + 8x - 40 = 2x(x - 5) + 8(x - 5)
= (x-5)(2x+8) = 2(x-5)(x+4)