Question

If y = 5x + 2, then find the value of
10xy + 4y in terms of y.

Answer 1

@Hero @Calcmathlete

Answer 2

wow u didn't type @bah here...

Answer 3

I'm not smart enough????

Answer 4

y=5x+2
y-2 = 5x
x = (1/5)(y-2)

Answer 5

10xy + 4y = 10 (1/5)(y-2) y + 4y = 2(y - 2)y + 4y = 2y^2 - 4y + 4y = 2y^2 <-Final answer

Answer 6

and it's you're

Answer 7

o_o I'm taking the PSAT... I don't know how to do these types of questions......

Answer 8

To clarify on what @bahrom7893 said, I would've done something a bit simpler? \[\implies10xy + 4y~~~~~~~~~~Original~Expression\]\[\implies 2y(5x + 2)~~~~~~~~~Factor~out~the~GCF\]\[\implies 2y(y) ~~~~~~~~~~~~~~~~~~Substitute\]\[\implies 2y^2~~~~~~~~~~~~~~~~~~~~~Multiplication~of~variables\]

Answer 9

ok let's do another problem I need to get better.

Answer 10

Uh ok then...
\[y = (3x + 2)^3\]\[\text{Simplify in terms of y: } (9x + 6)^3\]

Answer 11

Very similar to the one you were doing on that PSAT question.

Answer 12

ok I think I got it.

Answer 13

so do I multiply to the 3rd power?

Answer 14

Yes, the \(^{'3'}\) implies cubing it or multiplying by itself 3 times.

Answer 15

9x*9x*9x?

Answer 16

Not quite...could you show me what you did?

Answer 17

well you its so i multiply the exponent to the 3rd?