Substitution

What is the first step when evaluating (solving) the following expression?

2a + b if a = 3 and b = 4

• combine like terms

• substitute (plug) the number in for the variable

• add 2a with b

• look what answer my neighbor choose

Tags

CCSS.6.EE.A.2C

What should the expression look like when the values (numbers) are substituted in for the variables (letters)?

p +q+2 If p=3 and q=5,

• 3 + 3 + 2

• 3p + 5q + 2

• 5 + 5 + 2

• 3 + 5 + 2

Tags

CCSS.6.EE.A.2C

Evaluate: p +q+2 if p=3 and q=5

• 12
• 10
• 8

Tags

CCSS.6.EE.A.2C

Tags

CCSS.6.EE.A.2C

• 14

• 49

• 72

• 36

Tags

CCSS.6.EE.A.2C

• 7

• 8

• 9

• 10

Tags

CCSS.6.EE.A.2C

• 10

• 2

• 30

• 4

Tags

CCSS.6.EE.A.2C

If x=5, find the value of 7x-1

• 34
• 36
• 35

Tags

CCSS.6.EE.A.2C

If y=4, find the value of 3y+5

• 27
• 12
• 17

Tags

CCSS.6.EE.A.2C

If y=7, find the value of 2(y+4)

• 11
• 22
• 20

Tags

CCSS.6.EE.A.2C