Answer:
20 feet
Step-by-step explanation:
Since the term -(x-7)^2 is negative, the largest height that the ball can reach is when this term is 0. 0+20=20, meaning that the highest the ball can go is 20 feet. Hope this helps!
I think it’s false sorry if you get it wrong
Answer:

Step-by-step explanation:
Elimination method:


Add these equations to eliminate x:

Then solve
for y:



Write down an original equation:

Substitute 4 for y in
:




{
and
} ⇒ 
<em />
<em>hope this helps...</em>
Answer:
50%
Step-by-step explanation:
Let
be equal to the decimal when multiplied by 2 equals 1

Divide both sides by 2

Multiply the decimal by 100 to get a percent
0.5×100=50%
I hope this helps!