Answer:

Step-by-step explanation:
x
= 
7 x 1 = 7
8 x 2 = 16
Let me know if this helps!
Answer:
3111.5.
Step-by-step explanation:
3112 - 0.5 = 3111.5.
Answer:
I'm sorry but i only know a) so yeah
anyway a) is 20 in.
Step-by-step explanation:
Hope it helps!
Answer: a = -5
Heyy, so with this question you would have to substiute 1 for x because normally the coordinates have x first then y. E.g. (x,y)
soo, f(1) = a(1)^2 +5
then, f(1) = a + 5
then equate to zero. E.g. a+5=0
then move over 5 to other side E.g. a=-5
soo.. yah.. pretty sure haha :)