Simplify the expression: –2b + 7 – 2a + 5b – 6a

A.) –8a+ 3b +7
B.) 8a – 3b + 7
C.) –4a + 7b + 7
D.) 4a – 3b + 7

-8a + 3b +7   (Answer A)

Step-by-step explanation:

Let's take all the like terms and put them together!

There's:

-2b and 5b

-6a and -2a

7

Let' add all of them to each other!

-2b + 5b is 3b

-6a + -2a is -8a

7 remains 7

Since a is the first letter of the alphabet, we would order it in alphabetical order.

-8a + 3b +7

The answer is A

no he doesnt because "-16' is negatiive

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb