7] reflect (4,8) across x = 1 line

(-2,8)

Step-by-step explanation:

Since x=1 is a vertical line all you're doing is reflecting the point across the x-axis.

Since the point is (4,8), it is 3 units away from the line. All you do is go 3 units in the opposite direction on the other side of the line (starting at the line).

This is a confusing question to some people because that line is acting as the point of reflection instead of using the y-axis.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm