7.
(2b^2+7b^2+b)+(2b^2-4b-12)
(9b^2+b)+(2b^2-4b-12)
9b^2+b+2b^2-4b-12
11b^2+b-4b-12
11b^2-3b-12
8.
(7g^3+4g-1)+(2g^2-6g+2)
7g^3+4g-1+2g^2-6g+2
7g^3-2g-1+2g^2+2
7g^3-2g+1+2g^2
7g^3+2g^2-2g+1
Hope this helps!
Answer:
-92 - 10 + 2(145 - 7) + 174
Step-by-step explanation:
To subtract fractions, we need a common denominator, which would be 10. To do this, multiply 3/5 by 2
3 * 2 = 6
5 * 2 = 10
Now subtract
The answer is 25% because 20/50=0.25x100=25%