EXPRESSIONS, EQUATIONS, AND FUNCTIONS
solve 4(6n+7) when n=6
172.
Solve for: 11 minus square root of x , if x=64
3
Identify the slope and y-intercept: 6x+3y=18
m=-2
b=6
Write the equation of a line in Point Slope Form that goes through (-2,9) and has slope -2.
y-9 = -2(x+2)
Find x for: 5x+y=4, 6x-y=7
x=1
Write as an algebraic equation.
3 times, a number less than 15 is equal to 30
What is 3(15-x)=30.
Simplify: -7x(x - 13)
-7x2 + 91x.
Find the X-intercept and Y-intercept: -2x+5y=-20
x-intercept=10
y-intercept=-4
What is the equation of a line in standard form
Ax + By = C
What is the slope for x=4
Undefined
Is x=8 a solution for 2x+10<4x-7
No, 26<25 does not work!
Simplify: -16 - (-25.2).
9.2.
Solve for x:
16x - 4 = 4(2x - 3)
x = -1.
Create a line that is perpendicular to y = -x + 2
y = x (with any y-intercept)
True of false, y = 10 for the system.
5x-4y=20 , -2x+3y=1
False
You buy apples at $2 per pound and oranges at $3.50 per pound. What is an expression in Standard Form for the total cost of fruit purchased? (apples=x , oranges=y , total cost=c)
2x + 3.50y = c
An elevator moves at a rate of -5.8 feet per second from a height of 500 feet above ground. It takes 6 seconds for the elevator to make its first stop. How many feet above the ground is the elevator now?
465.2 feet.
Solve the proportion: b/8 = 9/4
b = 18
Solve: -5 < 2x - 2 < 9
-3/2 < x < 11/2
True or False: y = x2 + 1 is a linear function.
False. This is a parabola!
A rectangular banner is 16 feet long and has an area of 80 square feet. What is the perimeter of the banner?
Perimeter = 42 feet.
True or False: square root of 12 is an irrational number
True
Explain in words how you would graph: y=-x+7
Plot the y-intercept - up 7 on the y-axis. Then go down 1, right 1 to plot another point. Continue this pattern until you can connect the points with a line.
Explain in words how you would graph: y > 4x-3
Start at -3 on y-axis. Go up 4, right one. Continue this pattern.
Line is dotted, and you shade above the line.
True or False, y = 8 is a function.
Yes! It passes the vertical line test!