Writing algebraic expressions
Write an expression for the product of 3 and w.
What is 3w?
It costs $4 to enter the amusement park and it costs #3 per ride. Write an expression and define a variable to represent the situation
4 + 3r or 3r + 4
r = number of rides
Name all the terms:
2n + 4x - 8
2n,4x,8
Evaluate 3a - 2 for a = 7
3(7)-2 = 19
Evaluate when p = 6. p + 9
What is 15?
Write an expression for w less than 8.
What is 8 - w?
It costs $8 to get on the bus and $0.50 per bus stop afterwards. Write an expression and define a variable to represent the situation.
0.50b + 8 or 8 + 0.50b
b = number of bus stops
Name all the constants:
3x + 7 + 4y + 2
7 and 2
Evaluate p/4 + 3 for p = 24
24/4 + 3 = 9
Evaluate the expression for 31 - g when g is 3.
What is 28?
Write an expression for the difference of twice p and 9.
What is 2p - 9?
It costs $10 to get a taxi and $2 per block.
1) Define a variable
2) Write an expression
3) Find the cost of your ride if you ride 7 blocks
1) b = number of blocks
2) 10 + 2b or 2b + 10
3) It costs $24 to ride 7 blocks
Name all the variables:
3xy + 8x - 9 + 2a
x, y, a
Evaluate 7(n + 4) for n = 8
7(8+4) = 84
Evaluate the expression for 4w when w is 13.
What is 52?
Twice the difference of 6 and x
2(6-x)
It costs $15 for to activate your phone and $40 per month to keep it on.
1) Define a variable
2) Write an expression
3) Solve if you have your phone for 8 months
1) x = number of months
2) 15 + 40x
3) $335
Name all the coefficients:
x + 3y + 4z
1, 3, 4
(30/b) + 9 when b = 6
(30/6) + 9 = 14
Evaluate the expression 2rz - 9 when r is 2 and z is 5.
What is 11?
Write an expression for the difference of r and 8 times 9.
What is the difference of 9(r - 8) or (r - 8) * 9?
It costs $50 to enter the park and it costs $2 per hour to stay there.
1) define a variable
2) write an expression
3) Solve if you're at the park for 6 hours
1) x = number of hours
2) 50 + 2x
3) $62
Name all the coefficients:
2x + 3y + x
2, 3, 1
(24/4 - c) * a when a = 5 and c = 1
(24/4 - 1) * 5 = 25
Evaluate the expression 3(x + 4) - w, when x is 3 and w is 8.
What is 13?