Answer:
1.5n+9.5m^2
Step-by-step explanation:
7m^2 + 6.5n -4n + 2.5m^2 -n
Combine like terms
6.5n-4n-n+7m^2+2.5m^2
1.5n+9.5m^2
Plug in the expressions where the letters say for example the first problem would be set up as “4( x-5 )- 4( 2x+5 ). distribute and solve the equation.
Let
width,w
length, l = 1.6w ...eqn 1
area, a = l × w ...eqn 2
subst for l in eqn 2
a = 1.6 w × w = 4000
4000 = 1.6 w^2
w^2 = 2500
w = 50
subst for w in eqn 1
l = 50 x 1.6 = 80
length = 80 yds
width = 50 yds
Answer:
57.5
Step-by-step explanation: