Solve for x:
8(x-7)=-12-3x
x=4
Place into slope-intercept form:
2x - 3y = 12
y=2⁄3 x - 4
Solve for b:
|-2 + 7b| = 30
b=32⁄7, -4
Graph the lines and identify the solution:
y = -3/4 x - 7/4
x = -1
Solution: (-1, -1)
See graph
Factor the expression:
12x2 - 8x
4x(3x - 2)
Solve for p:
3(p + 2) = - (2p - 3) + 1
p = -2/5
A line goes through (-1,-1) and has a slope of -3. Write its equation in slope-intercept form.
y = -3x - 4
Graph the solution:
|4n - 9| > -1
All Real Numbers
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How many solutions does the system of equations have?
y = -1/2x + 1
y = 5/2 x2 - 2
2 Solutions
Factor the trinomial:
3x2 + 20x + 32 = 0
(3x + 8)(x + 4)
1/2x - 4 = -5(x + 4) - 1/2
x = -3
Graph the linear inequality:
y < 6x + 3
See board.
Graph the equation:
y = |x| + 4See board.
Graph the solution for the system of inequalities:
y > x + 2
y ≥ 4x - 1
See graph
Find the solutions to the quadratic using factoring:
5m2 + 120 = 50m
m = 4, 6
Solve for slope-intercept form:
6x - 2y < 1
y > 3x - 1/2
Graph the solution:
-4 + 8y < -( y - 5)
y<1
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1
Simplify:
(2 - 5i) - (6 - 3i)
-4 -2i
Solve the system of equations by elimination:
x + 9y = 26
8x - 18y = 28
(8, 2)
Find the discriminant, then state the number and type of solutions:
4b2 - 3b - 12 = -5
Discriminant: 121
2 Real Solutions
If ax2 + bx + c = 0, then x =?
[Hint: The solution is...]
-b±√ b2 - 4ac
2a
Graph the solution:
-1 < 7 + 2x ≤ 11
-4 < x ≤ 2
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-4 2
Simplify:
(2 + 7i)( -4 - 8i)
48 - 44i
Solve the system of equations by substitution:
3x + 2y = 2
y = 2x - 6
(2, -2)
Find the solution(s):
7x2 - 10x = 480
x = -7.60, 9.03