Answer:
9z^2+4x+1
Step-by-step explanation:
Remove parentheses.
7{x}^{2}+4x-1+2{x}^{2}+2
7x
2
+4x−1+2x
2
+2
2 Collect like terms.
(7{x}^{2}+2{x}^{2})+4x+(-1+2)
(7x
2
+2x
2
)+4x+(−1+2)
3 Simplify.
9{x}^{2}+4x+1
9x
2
+4x+1
Answer:
77
Step-by-step explanation:
-1 + 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 = 77
Hope this helps :)
Answer:
I believe it is true
Step-by-step explanation:
A line never stops (extends infinitely in opposite directions)
Answer:
7 divided by 2
Step-by-step explanation:
Answer: x=9
Step-by-step explanation:
2x+10=28
2x=18
x=9
