Write in simplest form.
sqrt30timessqrt42
6sqrt35
Determine if f(x) is even, odd, or neither.
abs(4+x)
neither
Factor the following.
100r^2-36s^2
(10r+6s)(10r-6s)
Identify what a, b, and c are in the following equation.
x^2+3x-1
a=1
b=3
c=-1
What is the axis of symmetry of
y=x^2-8x+4
x=4
In a group of 20 students, 7 have 1 pet, 8 have 2 pets, 2 have 3 pets, and the rest have more than 3 pets. What is the probability that a student selected randomly from the group has one pet?
7/20=0.35
Simplify
4sqrt45-10sqrt20
-8sqrt5
Determine whether f(x) is even, odd, or neither.
x^4+2x^2
even
Factor the following.
a^4+14a^3+45a^2
a^2(a+9)(a+5)
Use the quadratic formula to solve the following.
x^2-6x+4=0
x=3pmsqrt5
What is the vertex of
y=-x^2-6x+3
(-3, 12)
In a group of 20 students, 7 have 1 pet, 8 have 2 pets, 2 have 3 pets, and the rest have more than 3 pets. What is the probability that a student selected randomly from the group has more than one pet?
13/20=0.65
Rationalize the denominator.
sqrt5/(sqrt2+3
(sqrt10-3sqrt5)/-7
Determine whether f(x) is even, odd, or neither.
x^3-2x
odd
Factor the following.
3x^2-19x+6
(3x-1)(x-6)
Use the quadratic formula to solve the following.
x^2+4x-3=0
x=-2-sqrt7 , x=-2+sqrt7
Is the following graph going to have an extreme minimum or extreme maximum?
y=-x^2+8x
Extreme Maximum
In a group of 20 students, 7 have crayons, 11 have markers, and 4 have both. What is the probability that a randomly selected student has a crayon or marker?
14/20=7/10=0.7
root(4)(384a^9b^7)/root(4)(12a^3)
2abroot(4)(2a^2b^3)
Determine whether f(x) is even, odd, or neither.
abs(x)+x^2
even
Factor the following.
49x^2-56x+16
(7x-4)^2
Use the quadratic formula to solve the following.
2x^2+4x-1=0
x=(-2pmsqrt6)/2
Find the vertex, axis of symmetry, and the extreme value of the following quadratic function.
y=-x^2-2
Vertex: (-1, -3)
AOS: x = -1
Extreme: Max at (-1, -3)
A candy jar contains 3 red, 2 pink, and 7 yellow starbursts. Three starbursts are chosen at random from the jar. What is the probability that all three starbursts are the same color?
9/55=0.16
root(4)(96x^5y^5)/root(4)(3y)
2xyroot(4)(2x)
Determine whether f(x) is even, odd, or neither.
xabs(x)-2x^3
odd
Factor the following.
216x^3+1
(6x+1)(36x^2-6x+1)
Each year the value of a boat depreciates by 7% of its value on the previous year. What is the price (whole number) of the boat when it is 3 years old given the equation to calculate salvage value after t years is
y=f(t)=40,000(0.93)^t
The boat is about $32,174 when it is 3 years old.
Find the vertex, axis of symmetry, and the extreme value of the following quadratic function.
y=-2x^2+8x
Vertex: (2, 8)
AOS: x = 2
Extreme: Max at (2, 8)
Show that the probability of driving to work given they are male is equal to the probability of driving to work given they are female. What can you conclude about the relation between gender and transportation method?
P(DlM)= 20/50=0.4
P(DlF)=10/25=0.4
P(D)=0.4
Gender and transportation method are independent.