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Maddy’s cell phone company charges $35 a month for phone service plus $0.50 for each text message. How many text messages does Maddy send in a month if her bill was $52?
34 text messages
The MHS footy team purchased uniforms and equipment for a total cost of $937. The equipment cost $612, and the uniforms cost $25 each. How many uniforms did the school purchase?
13 uniforms
- 5x + 9 = -1
x = 2
7x - 4x + 3 = - 15
x = -6
5(3x+2) - 5x = 120
x = 11
10(2x-5) +2x = -94
x = -2
-5x + 10 = x + 52
x = -7
5x +2 = -10x + 92
x = 6
12x + 30 = -54
x = -7
-3x +20 = -6x +5
x = -5
12x + 8x -50 = 150
x = 10
4x +12 = -2x + 132
x = 20
-20x + 45 = 2x -21
x = 3
x^2 = 16
x = +4, -4
x^2 = -36
None! There is no number that multiples with itself to make a *negative* number
3x^2 = 75
x = +5, -5
