Answer:
x > -3.2
Step-by-step explanation:
Given:
4/5 of a pie left after their family picnic.
Each slice of pie was 1/15 of the total pie.
To find:
The number of remaining slices of pie.
Solution:
Let x be the number of remaining slices of pie.
Part of total pie in one slice = 
Remaining part of total pie in x slices = 
According to the question, 4/5 of a pie left after their family picnic.

Using cross multiplication, we get


Divide both sides by 5.

Therefore, the remaining number of slices of pie is 12.
Answer:
Should be B
Step-by-step explanation:
You have 3 boxes
Small is 1/2 of medium so .5x
Large is 2 times larger then medium so 2x
Then add
2.5x
<A = <B
5x - 18 = 3x + 42
2x = 60
x = 30
<A = 5(30) - 18 = 132
Answer is x = -7 and x = -3
<span> x2 + 10x = -21
</span><span> x2 + 10x + 21 = 0
</span>(x +3) (x +7) = 0
(x +3) = 0
and
(x + 7) = 0
so x = - 3 and x = -7