Answer: 
<u>Add 15 to both sides</u>
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Answer:
$17.22 for pass and 8.49 for lunch. total 26.16 for students.
Answer:
x=−3 and y=7
Step-by-step explanation Solve: 7x+2y=−7for x:
7x+2y=−7
7x+2y+−2y=−7+−2y(Add -2y to both sides)
7x=−2y−7
7x
7
=
−2y−7
7
(Divide both sides by 7)
x=
−2
7
y−1
------------
−2
7
y−1forxin11x+5y=2:
11x+5y=2
11(
−2
7
y−1)+5y=2
13
7
y−11=2(Simplify both sides of the equation)
13
7
y−11+11=2+11(Add 11 to both sides)
13
7
y=13
13
7
y
13
7
=
13
13
7
(Divide both sides by 13/7)
y=7
------------------------
Substitute7foryinx=
−2
7
y−1:
x=
−2
7
y−1
x=
−2
7
(7)−1
x=−3(Simplify both sides of the equation)
We know that
[volume of the prism]=L*W*H
L=x²*y in
W=x in
H=y² in
[volume of the prism]=(x²*y)*(x)*(y²)-----> x³*y³ in³
the answer is
x³*y³ in³
So first, we want to find how much in total did his elevation change. So we want to subtract the him starting from 6 feet below sea from the 98 feet below sea level, to get 92 feet.
Now, since he descended in four equal intervals, we can just divide 92 into four equal parts, or divide by 4, to get 23 feet.
So the diver's change in elevation in each interval was (negative?) 92 feet.
