Bismarck and Shannon get into an argument over whose grandma makes the BEST cookies!! They both ask their grandma's to make cookies for their math classes. Shannon's grandma can make 2 batches cookies per hour plus 4 extra batches cookies she made the other day. Bismarck's grandma can make 4 batches cookies per hour. How many hours will it take for their grandma's make the same amount of cookies?

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

25/6

step-by-step explanation:

you multiply 4 by the denominator (4*6=24) and add it to the numerator which makes it 25/6.