Answer:
So, cost of 1 pair of shorts =$12
Step-by-step explanation:
Let cost of 1 pair of jeans =x
Cost 1pair of shorts =y
cost of 1 pair of shirts=z
We can set up equations as
x+4 y+2 z=84
2 x+1 y+3 z=76
x+2 y+z=52
Solve the equations for y.
Take first and second equations multiply first equation by -2 and add it with second equation.
-2 x-8 y-4 z=-168
2 x+1 y+3 z=76
Add them, it gives -7 y-z =-92
Now, take second and third equations, multiply the third equation by -2 then add them together.
2 x +1 y +3 z =76
-2 x-4 y-2 z=-104
Add them together,
-3 y +z =-28
Now, take the -7 y -z =-92 and -3 y +z =-28
Add the equations
-10 y = -120
Divide both sides by -10
y =12.
So, cost of 1 pair of shorts =$12
z=8
Answer:
This year the parking lot should have 16 spaces for RVs
Step-by-step explanation:
we know that
using proportion
solve for r
Multiply in cross
therefore
This year the parking lot should have 16 spaces for RVs
x ----> the number of car spaces
r ----> the number of RV spaces
we know that
----> equation A
----> equation B
substitute equation A in equation B
solve for r
\
Answer:
-5y + 3x (or) 3x - 5y
Step-by-step explanation:
-8y-(x-4x)+3y
Solve the problem in the parentheses first. (x-4x)
-8y-(-3x)+3y
The problem within the parentheses is as simplified as we are going to get it. Now we can simplify the y values. (-8y + 3y)
-(-3x) -8y+3y
-(-3x) - 5y
Get our x value out of the parentheses now. -(-3x)
-(-3x) = +3x (two negatives makes a positive)
This leaves us with our simplified equation.
3x - 5y
or
-5y +3x