Evaluating Expressions
If x=1, what is the value of the expression x+5?
(1) + 5 = 6
Simplify: 5x+4+2x
7x+4
x+5=11
x=6
If x=2, what is the value of the expression x2+4?
(2)2+4 = 8
Simplify: 5x-2+3x+7
8x+5
y-10=12
y=22
If x= -5, and y=4, what is the value of 2y + x2?
2(4)+(-5)2= 33
Simplify: 3y4+10-6y+8-7y4
-4y4-6y+18
3x = 36
x=12
If x=2, y=6, and z=8, find the value of 6x+yz.
6(2)+(6)(8) = 60
Simplify: 9ab+7a-3+8a-12ab+2
-3ab+15a-1
(x/2)=7
x=14
If x=4, and y=6, find the value of (x+y)/2.
(6+4)/2 = 5
(2x2-4x+5) + (3x2+8x-10)
5x2+4x-5
7x=70
x=10