Answer:
tricky picky question pal,
Step-by-step explanation:
What are the awnswes
An artist wants to frame a square painting with an area of 400 square inches.
(a) x is the length of one side of the painting
Area of the square formula is
side is x. so area becomes
We know Area is 400. so the equation becomes
(b) Solve the equation for x
(take square root on both sides)
When we take square root we put +-
+-20 = x
x = +20 in and x=-20in
So there are two solutions for the above equation.
(c)No. we know x is length of the side. the length cannot be negative .
So x=-20 inch is not valid
x=20 inches is our only solution.
(d)To find the length of the wood trim needed to go around the painting, we find the perimeter of the square
Perimeter = 4* side
= 4* x = 4* 20 = 80 inches
Answer: are we just simplifying?
Step-by-step explanation:
Let
Eq1 : x - 2y = 12
Eq2 : 4x + 2y = 16
For substitution, we need to rearrange on of the equations so that we can substitute it in the other. Let's pick eq2 and rewrite it as 2y = 16 - 4x. We see that eq1 also has 2y in it, so we can plug this new version of eq2 in there.
3x - (16-4x) = 12
Now solve for x.
7x=28, so x=4
Plug that into either equation to solve for y. You get y=0.
So your answer is x=4, y=0