I am assuming you wrote the problem wrong. Is it a^2?
A^2 -4A-21=0
(A-7)(A+3)=0
A=7 A=-3, ignore the negative number because it doesn't make sense if you plug in for a.
length=a+3=7+3=10
Width=7=a
Answer:I dont know not gonna lie
Step-by-step explanation:
14 volunteers will not be able to help.
Step-by-step explanation:
According to given statement;
One booth requires 3 Volunteers.
No. of booths = 16
Given number of volunteers = 62
We will multiply total number of booths with 3 to find the number of volunteers required.
Volunteers required = No. of booths x 3
Volunteers required = 
Volunteers required = 48
Subtract the required volunteers from total volunteers;

14 volunteers will not be able to help.
Keywords: Subtraction, Multiplication.
Learn more about subtraction at:
#LearnwithBrainly
Answer:
Correct!
Step-by-step explanation:
That’s right
50% off means half price, so half of 49.98 is 24.99
the necklace now costs 24.99 dollars