Solve the simultaneous equations by substitution x
+
3
y
=
−
7
x
=
5
−
y

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Find the dimensions of the circle. area = 64π in.² r= in.