Question

Factor and check by multiplying: 6x + 10y -2 Not sure what are they asking?

Answer 1

you have to evaluate the expression

Answer 2

so factor the equation first. and once you have that, multiply it out to make sure you have 6x + 10y - 2

Answer 3

so what is the largest common factor of the three coefficients?

Answer 4

So I came up with 2(3x +5y) is that somewhat correct?

Answer 5

well, check. if you multiply that out, what do you get?

Answer 6

6x + 10y

Answer 7

but where I get lost is when it says -2 at the end of the equation.

Answer 8

ok, what is the largest value that you can divide the smallest coefficient (2) by without getting a fraction.

Answer 9

OK I dumb ok. I have not done this in 20 yrs so bear with me. So is the largest value you can divide 2

Answer 10

I was not trying to insult your intelligence. I was just trying to start at the first step.

Answer 11

yes, 2 is the largest value. therefore it is the greatest common factor.

Answer 12

I know I apologize it just frustrates me.

Answer 13

therefore, divide each of the other coefficients (6 and 10) by 2.

Answer 14

So is my final answer 2(3x +5y) =6x +10y

Answer 15

3/5 ?

Answer 16

so the -2 is a constant, right?
all you have to do is put that in the bracket as well.
so you'll have 2(3x + 5y - 1)

try multiplying that out.

Answer 17

6x + 10y- 2

Answer 18

2(3x+5y-2)

Answer 19

sorry my internet was out for a couple minutes.

Answer 20

no, that won't work.
you'll get 6x + 10y - 4 if you have -2 inside the bracket. -2 has to be divided by 2.
so inside the bracket, you should have -1.

Answer 21

so if you divide each term by two you get
(6x+10y-2)/2 = (3x+5y-1)

so you need to multiply the entire expression (3x+5y-1) by 2.

therefore it is 2(3x+5y-1)

Answer 22

@bonjovifan03 have you ever looked at any of Sal Kahns videos on khanacademy.org. His math videos have helped me tremendously.

Answer 23

Got it ty all.. ty tomo I will check into that...
One more question I need help on and I am done for the night
Simplify: 20 +4^(3 )÷(-8)

Answer 24

This one i really dont get. What does the symbol mean after the four?

Answer 25

follow BEDMAS
^ = exponent

Answer 26

the symbol after the four is an exponent. It means you have to multiply the number preceding it that many times.

Answer 27

therefore 4^3 = 4*4*4

Answer 28

by order of operations you must divide 4^3 by -8 before you can add it to 20

Answer 29

well I know so far its 12 divided ny -8 which doesnt work so would i find the common number they have between them?

Answer 30

would the answer be 4

Answer 31

why 12?
4*4 = 16*4 = 64.