Warm Up 11/29

What are the constants in the expression? -4x + 6y - 2

• -4x, 6y, -2

• x, y

• 4x, 6y

• -2

What is a coefficient?

• the letter that represents a variable

• the number attached to the variable using multiplication

• the number that sits alone and DOES NOT have a variable attached

• 3

• d and c

• 2d, 1/4c, 3

2x+3 when x = 4

• 11

• 10

• 9

• 8

12y - 10z when y=5 and z=4

• 21

• 2

• 100

• 20

3.75x - 6.20y when x=10 and y=3

• 18.90

• 18.60

• -2.45

• 23

Tristan currently has 5 gallons of water in his water bottle. During each class, he drinks 0.5 gallons of water. Which expression could be used to represent the amount water after, c, classes?

• 0.5 + 5c

• 5 - 0.5c

• 5 + 0.5

• 5 - 0.5

Which scenario represents the expression 4x + 3.7

• Larry has 4 boxes and then 3.7 more.

• Lily buys 4 toys for $3.75 each

• Lisa earns $4 for each hour she works and already has $3.70 in her account

• not sure

Write an expression to represent the scenario below

Jermey makes $4.70 every time he mows a lawn, m, but it cost him $6.80 to refill his lawn mower with gas, g. Write an expression to determine how much money he makes.

• 4.70m+6.60g

• 4.70m-6.80g

• 4.70g-6.80m

• 4.70g+6.80m

You went to the state fair a few weeks ago to get your favorite fair food and ride the rides. The rides, r, cost $1.25 per ride and the funnel cakes, c, cost $6.00 for each one. If you ride 5 rides and purchase 2 funnel cakes, how much did you spend?

• $15.75

• $32.50

• $18.25

• $8.25