<u>answer</u>:
2x²+2x-12
<u>explanation:</u>
(x + 3) (2x – 4) [ open the bracket ]
x(2x) -4(x) +3(2x)+ 3(-4) [ multiplication ]
2x²-4x+6x-12 [ simplify ]
2x²+2x-12 [ final answer ]
Answer:
2.5 gal
Step-by-step explanation:
let be x = galons of solution to be drained and replace with bleach
so, we have to substract to the current solution of bleach 0.04*120, x gallons that have a concentration of 0.04 x
and also, we have to add the same gallons of bleach to the solution, that is x
and have to obtain a final concentration of 0.06*120
we can express the problem with the follow equation:
0.04*120 - 0.04*x + x = 0.06*120
solving the equation for x:
4.8+0.96*x=7.2
0.96*x=7.2-4.8
0.96*x=2.4
x =2.5 gallons
Answer:
C. y=7/9x+17/9
Step-by-step explanation:
Take the slope. slope= m = y2-y1/x2-x1
=5-(-2)/4-(-5)
=7/9
Then put it into point-slope form.
y-y1=m(x-x1)
=y-5=7/9(x-4)
Simplify.
y=7/9x-28/9+5
y=7/9x+17/9
Step-by-step explanation:
not always they are coplanar