Answer:
A 5
Step-by-step explanation:
Parts on the left have the same ratio as parts on the right.
... x/(x+5) = (x -2)/(x +1)
Multiplying by (x+5)(x+1), we get
... x(x +1) = (x -2)(x +5)
... x² +x = x² +3x -10 . . . . eliminate parentheses
... 0 = 2x -10 . . . . . . . . . . subtract x²+x
... 0 = x -5 . . . . . . . . . . . . divide by 2
... 5 = x . . . . . . . . . . . . . . . add 5
Answer:
![6:14=3:7](https://tex.z-dn.net/?f=6%3A14%3D3%3A7)
Step-by-step explanation:
There are 6 blue marbles and 14 red marbles, so the ratio of blue marbles to red marbles ![=6:14=3:7](https://tex.z-dn.net/?f=%3D6%3A14%3D3%3A7)
Answer:
kjldsjlkgjvdlskvjlxzk
Step-by-step explanation:
Answer: 3 hours
Step-by-step explanation:4/5 of 80 is 64. 80-64=16 8*2=16 7.75<8 Therefore hours have to be >2
Answer:
Step-by-step explanation:
k = (4ac – b2) / 4a. Find the vertex of y = 3x2 + x – 2 and graph the parabola.