Substituting Numbers

If x = 1, y = 3, and z = 2, what is the value of the expression 4xy + 3xz+ 7y?

• 46 

• 42

• 39

• 23

Given that x= -2 in the equation 5x+4y=46, find y.

Given that x= -3 in the equation -2x+7y=20, find y.

Given that y= -2 in the equation 5x-3y=26, find x.

Substitute x= 3 into the expression 3x+1

• 3

• 9

• 10

• 7

• 22

• 36

• 15

• 21

If a = 6 and b = 7,find the value of 15-a-b.

• 2

• 3

• 4

• 5

4 + 6b, b=3

• 67

• 13

• 22

• 13

2x + x²
when x = 3

• 12

• 15

Evaluate the expression.   Let g = 3    h = 9 
4h + 2g + 4

• 42

• 46

• 34

• 58