Evaluating Expressions
Evaluate: 4x + 6 when x = -2
-2
A box of chocolates costs $15 per b box with an additional $7 delivery fee. Write an expression can be used to solve for the total cost of delivering b boxes of chocolates.
15b + 7
5x - 5 is equivalent to:
A. 5 + 5x
B. 5 - 5x
C. -5 + 5x
D. 0x
C. -5 + 5x
Distribute: 7(2x + 12y)
14x + 84y
Simplify by combining like terms:
2x + 5y - 5x
-3x + 5y
Evaluate: -3x + 4y when x = 1 and y = 7
25
What expression can be used to determine the total cost of buying y yo-yos for $8 each and f fidget spinner's for $4 each. You also have a coupon that takes $5 off your purchase
8y + 4f - 5
2x + 5y - 4x is equivalent to
A. 6x + 5y
B. 5y + 2x
C. -2x + 5y
D. 3xy
C. -2x + 5y
Distribute: 4(-9x - 8y)
-36x - 32y
-7 + 4x - 9 - 2x
2x - 16
Evaluate: -3x + 7z when x = -5 and z = -6
-27
A tank containing 35 gallons of water is leaking at a rate of 1/3 gallon per minute. Write an expression to determine the number of gallons left in the tank after m minutes
35 - 1/3m
6(-3 + 4x) is equivalent to
A. 24x - 18
B. 18 - 24x
C. 6
D. -18 - 24x
A. 24x - 18
Distribute -9(-6x + 12y)
54x - 108y
5y - 6x + 4x - 11y + x
-x - 6y
Evaluate 3.2x - 7.5y when x = 2.5 and y = 4
-22
A mountain climber is descending 15 meters per minute from an elevation of 250 meters. Write an expression to determine the climber's elevation after m minutes
-15m + 250
-4(-7x - 4x) is equivalent to
A. 44x
B. 12x
C. -44x
D. -12x
A. 44x
Distribute: -1/4(-36x - 40y)
9x + 10y
-6.2 - 2y - 8y + 1.8
-10y - 4.4
Evaluate 3/8x - 5/7y when x = 4 and y = -2
Fully Simplified. Improper faction or mixed number
41/14 or 2 and 13/14
A submarine is descending 12 meters per minute of an initial elevation of 85 meters below sea level. Write an expression that determines the submarines elevation after m minutes
-12m - 85
8x - 5 - 5x - 6 is equivalent to
A. 3x + 11
B. 13x - 11
C. 6x + 5 - 3x - 16
D. -3x - 11
C. 6x + 5 - 3x - 16
Distribute and fully simplify:
-1/9(108y - 45y)
-7y
-6z - 5.5 + 3.5z + 5y - 2.5
5y - 2.5z - 8