Question

Can you evaluate the expressions for the given value. (show steps if you can)

Q1.) 3(2x+1) for x = -8
Q2.) -2m^2 + 10 for m = 5
Q3.) ab + bc + ac for a=2, b=5, c=3

Answer 1

Q1. -45

Q2. -10

Q3. 31?

Explanation:

Q1 -- you times -8 and 2 which comes out to -16. Since you have -16 + 1 inside of the parentheses you add 1 to -16 which comes out to -15. Then you take -15 times 3 and it comes out to -45.

Q2 -- the m gets replaced by the 5 so now its -2 times 5. Which comes out to -10. Then you take -10 times 2, which is -20. Now take -20 + 10 which gives us the answer of -10.

Q3 -- I'm not completely sure on this one but I think the equation would transfer to this 2*5 + 5*3 + 2*3. So 2*5 is 10, 5*3 is 15, and 2*3 is 6. Add them all together and you get 31.

I hope this was right and it helps you!