Solve the Absolute Value Equation:
l 2x - 1 l = 5
2x - 1 = 5
2x = 6
x = 3
2x - 1 = -5
2x = -4
x = -2
Solve the following however you'd like.
-4y = 36 + 11x
-10x - 10y = 20
-10y = 10x + 20
y = -x - 2
-4(-x - 2) = 36 + 7x
-28 = 7x
-4 = x
-10(-4)-10y = 20
y = 2
(-4,2)
Write the following equation in vertex form.
y = x2 + 16x + 71
x = -B/2a = -16/2(1) = -8 = c
f(-8) = 82 + 16(-8) + c
f(-8) = -192 + 71
f(-8) = -121
(-8, -121)
y = (x + 8) - 121Classify the following polynomial:
7x3 + 15x2
According to it's standard form, degree, and number of terms.
Standard form: 7x3 + 15x2
Degree: Cubic
Terms: Binomial.
Simplify the following radical expression
√16x8
Solve the following Absolute Value Equation:
2 l x + 9 l + 3 = 7
2 l x + 9 l + 3 = 7
2 l x + 9 l = 4
(split into two)
x + 9 = 2
x = - 7
x + 9 = - 2
x = -11
Solve via substitution.
4x - y = 20
-2x - 2y = 10
-2x - 2 (4x - 20) = 10
-2x - 2 (4x - 20) = 10
-10x + 40 = 10x = 3
4(3) - y = 20
y = 8
(3,8)
Factor the following.
81y2 - 49
√81y2 - √49
(9x + 7) (9x - 7)
Expand the following:
(4y2 - 5x)3
64y6 - 240y4x + 300y2x2 - 125x3
Simplify.
√72x3y2 x √10xy3
√720x4y5
(√144) x (√5) x (√x4) x (√y5) x (12) x (√5) x (x2) x (y2√y)
Translate into standard form.
m = -4 through (0,-9)
y = -4x - 9
4x + y = -9
Solve via elimination.
-4y - 11x = 36
20 = -10x - 10y
20 = -10(4) - 10y
20 = 40 - 10y
-2 = y
(-10x - 10y = 20) -2
55x - 20y = 18020x + 20y = -40
x = -4
Solve by factoring.
x2 - 5x + 6 = 0
(x-2) (x-3)
(x - 2) = 0 (x - 3) = 0x = 2
x = 3
What are the real and/or imaginary solutions to this polynomial expression?
x3 + 2x2 + 5x + 10 = 0
x2(x + 2) 5(x + 2)
(x + 2) (x2 + 5) = 0
x = -2
x = +- i √5
Simplify.
(3 + 2√5) (2 + 4√5)
6 + 12 √5 + 4√5 + 8√25
6 + 16√5 + 8(5)
6 + 16√5 + 40
46 + 16√5
Convert the following into standard form:
A line parallel to y = 9/5x - 3 through the point (10,15)
m = 9/5
y = 9/5(10) + b
15 = 18 + b
-3 = b
(y = 9/5x - 3) 5
5y = 9x - 3
-9x + 5y = -3
Represent the following system with a matrix:
x - 3y + z = -6
x + 3z = 12
y = -5x +1
x - 3y + z = -6
x + 0y + 3z = 12
5x + 1y + 0z = 11 -3 1 l 6
1 0 3 l 12
5 1 0 l 1
9 + 12i / 3i
27i + 36i2 / 9i2
27i - 36 / -9
... (Simplify)
-3i + 4
The roots of a cubic polynomial are -2 and 4i. Write the polynomial in standard form.
P(x) = (x + 2) (x2 + 16)
Find the solution for...
√(2x - 3) = 8
√(2x-3) = (5)2
2x = 28
x = 14
Describe the following Transformation:
y = -6 (x - 4)2 + 8
Up eight units
Right four units.
Solve the system.
-x - y - 3 = 9
z = -3x - 1
x = 5y - z + 23
-x - y - 3(-3x-1) = 9
8x - y = -12
(8x - y = 12)-5
-2x - 5y = 24
-2(-2) - 5y = 24
-5y = 20
y = -4
-40x + 5y = 60
-2x - 5y = 24
x = -2
z = -3(-2) - 1
z = 5
Your school's jazz band is selling CDs as a fundraiser. The total profit, p, depends on the amount x that your band charges for each CD. The equation:
p = -x2m+48 - 300
models the profit of the fundraiser. What is the least amount, in dollars, you can charge for a CD to make a $200 profit?
200 = -x2 + 48x - 300
x2 - 48x + 300
x2 - 48x + 500 = 0
x = 48 +- √((-48)2 - 4(1)(500)) / 2 (1)
x = 48 - 17.4 / 2 = 32.7
x = 48 + 17.4 / 2 = 15.3
Expand the following:
(2x - 5y)8
256x8 - 5120x7y + 44800x6y2 - 22400x5y3 + 700,000x4y4 - 1,400,000x3y5 + 1,750,000x2y6 - 1,250,000xy7 + 390,625y8
Let f(x) = 4x + 7 and
g(x) = √(x) + x
Find ( f + g ) and its domain,
(f + g) (x)
= f(x) + g(x)
= (4x + 7) + (√(x) + x)
= 5x + √(x) + 7
Domain: x >= 0