What is the factored form of the expression? 120y^2 – 63y – 147

3(5y   -     7)(8y +   7  )

Step-by-step explanation:

120y^2 – 63y – 147

Factor out a 3

3(40y^2 -21y -49)

40 = 1*40, 2*20  4*10  5*8

49 = 1*49 and 7*7

We need to play with the combinations to get -21 when added together

I will try

3(5y        7)(8y    7  )

We need the bigger one to be negative

5*7  + -8*7 = 35-56 = -21

So the 7 that multiplies by the 8 must be negative

3(5y   -     7)(8y +   7  )

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.