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Math
Grade 9-12
Answer Key
Linear Equations
Solve one- and two-step equations, graph lines, and interpret slope and intercept.
Answer Key
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Linear Equations
Solve one- and two-step equations, graph lines, and interpret slope and intercept.
Math - Grade 9-12
Instructions: Solve each equation or problem. Show all algebraic steps. Leave fractions in simplified form.
- 1
Solve for x: 3x - 7 = 14.
x = 7 - 2
Solve for x: 2(x + 5) = 18.
x = 4 - 3
Write the equation of a line that passes through (0, 3) with a slope of -2.
y = -2x + 3 - 4
Find the slope of the line passing through (2, 5) and (6, 13).
m = 2 - 5
Solve for x: 4x + 3 = 2x - 9.
x = -6 - 6
Find the x-intercept of the line y = 3x - 9.
x = 3 - 7
A phone plan charges $30 per month plus $0.10 per text message. Write an equation for the total cost C in terms of the number of texts t.
C = 0.10t + 30 - 8
Using the equation from the previous problem, how many texts were sent if the monthly bill was $55?
250 texts
LivePhysics.com Math - Grade 9-12 - Answer Key