Answer:

Step-by-step explanation:
We have to simplify the following expression as given by

= 
=
( Answer )
Because, we know that
and 
If we consider
and
,
then 
The number is -30
Exp
2/3=-20
1/3=-10
3/3=-30
The inverse of the equation y = x² - 4, x≤ 0 is 
<h3>How to determine the inverse of the equation?</h3>
The equation is given as:
y = x² - 4, x≤ 0
Swap the x and y values
x = y² - 4
Add 4 to both sides
y² = x + 4
Take the square root of both sides

Hence, the inverse of the equation y = x² - 4, x≤ 0 is 
Read more about inverse equations at:
brainly.com/question/11302699
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I will set it up for you only.
Let a = adult tickets
Let s = student tickets
Here is your system of equations:
a + s = 800
12a + 8s = 7500
Answer:
Step-by-step explanation:
Here you're being asked to recall your own experience in paying for "value meals." How much have you paid per meal?
If each meal costs $6.50, then 5 would cost $13.00 before tax, and
(1.07)(5)($13.00), or $69.55 total.
Note that there's not just one possible total cost, and that we don't know much about this situation but must insert reasonable values, such as a $6.50 per meal unit cost and a 7% tax rate.