Using substitution- show you steps X-2y=-25
3x-y=0

y=x+4
2x+y=19

-3a+b=4
-9a+5b=-1

m+2n=1
5m+3n=-23

5c+3d=11
5c-d=5

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?