How do you solve #19 on what is the world's saddest candy. the question is, 10b-7a+(-b)+10a-9b+5 and i know the answer is 3a+5 i just don't know how to solve it. you to those of you who will me out.

Step-by-step explanation: So, you need to add like terms. All the A's must be combined, all the B's and so on. Let's start with the A's. You have -7 (because there is a minus sign in front), and a 10. -7 + 10 gives you 3. That is where your 3a comes from.

Next, let's do the B's. You have 10, -1, and -9. It equals zero. So, you have no B's in the final answer.

You leave the singular 5 because you can't combine it with anything. So your final answer is 3a+5.

If you need any clarification or other help, please let me know!

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.