The equation for the parabola would be:
Lin's number = l
pazi's number = p
l = p + 7
p = p
p + 7 + p = 49
2p + 7 = 49
2p + 7 (-7) = 49 (-7)
2p = 42
2p/2 = 42/2
p = 21
l = p + 7
l = 21 + 7
l = 28
pazi is 21 years old, Lin is 28 years old
hope this helps
The perimeter of a rectangle is the sum of all the side lengths of the rectangle. For a rectangle, we two lengths and two widths so the perimeter can be calculated as:
P = 2l + 2w
We can use this formula to calculate for the width.
16.8 = 2(3.6) + 2w
w = (16.8 - 2(3.6)) / 2
w = 4.8 in
