Answer:
−10x2+−18x+26
Step-by-step explanation:
Let's simplify step-by-step.
−5x2−9x+8−5x2−9x+8−−6x2+5−6x2+5
=−5x2+−9x+8+−5x2+−9x+8+6x2+5+−6x2+5
Combine Like Terms:
=−5x2+−9x+8+−5x2+−9x+8+6x2+5+−6x2+5
=(−5x2+−5x2+6x2+−6x2)+(−9x+−9x)+(8+8+5+5)
Answer:
y=6x
Step-by-step explanation:
y-y1=m(x-x1)
y-0=6(x-0)
y=6(x)
y=6x
Answer:
see below
Step-by-step explanation:
butterfly = x minutes
breast = y minutes
total is 50 minutes
breast stroke = butterfly +20
Part A
x+y = 50
y = x+20
Part B
Substitute the second equation into the first
x+ (x+20) = 50
2x+20 = 50
2x+20-20 = 50-20
2x = 30
2x/2 = 30/2
x = 15
y = x+20
y = 20+15
y = 35 minutes
35 minutes on the breast stroke
Part C
45 minutes on the butterfly is not reasonable
We only have a total of 50 minutes
50-45 = 5
But he spend more time on the breast stroke ( 20 minutes more), but if he spend 45 minutes on the butterfly, he would have to spend less on the breast stroke.
