Algebra Substitution

if x = 4,

calculate 2x + 5

• 9

• 13

• 13x

• 8x + 5

the product of 34 and z 

• 34/z

• z/34

• z X 34

• 34 - z 

take 10 away from s 

• 10 - s 

• s + 10

• s - 10

• s/10

six times the number of girls
Let g = number of girls

• 6 + g

• 6g

• g - 6

If x = 2, in the equation y = 3x - 5, what is the value of y?

The solution to the system of equations y = 2x + 1 and y = 4x - 1 is (a)   .

• (1,3)

• (0,0)

• (2,5)

• (3,7)

Define substitute.

• the number multiplied by a variable

• to replace a variable with a value or an expression

• a number standing alone

• to find the value of an expression

N + 6= 12, What is N

• 4

• 5

• 6

• 7

29 - q = 13

• q = 17

• q = 16

• q = 42

• q = 13

If a = 4 b = 6, what is 3a + 5b?

• 40

• 42

• 44

• 46