EXPRESSIONS, EQUATIONS, AND FUNCTIONS
4(6n+7) when n=6
What is 172.
11-square root of x where x=64
What is 3.
Identify the slope and y-intercept: 6x+3y=18
What is m=-2;b=6
Equation of the line in slope intercept form that passes through the point (-2,9) and has slope -2.
What is y=-2x+5
Solve the linear system: 5x+y=4, 6x-y=7
What is x=1, y=-1 or (1,-1)
3 times the difference of a number m and 15 is equal to 30 (as an expression)
What is 3(m-15)=30.
Simplify: -7x(x-13)
What is -7x2+91x.
X-intercept and Y-intercept: -2x+5y=-20
What is x-intercept=10; y-intercept=-4
Equation in standard form of the line that passes through the two given points: (3,9) (1,1).
What is -4x+y=-3.
Solve the system: 2x + y = 10
5x - y = 11
(3, 4)
x=8 is a solution for 2x+10<4x-7
What is no 26<25 does not work!
-16-(-25.2).
What is 9.2.
Solve for x: 16x-4=4(2x-3)
What is x=-1.
Equation of the line that passes through the given point and is perpendicular to the given line: (3,-3), y=x+5
What is y=-x.
Is the ordered pair a linear system? (8,5), 5x-4y=20, 3y=2x+1
What is No.
You buy apples at $2 per pound and oranges at $3.50 per pound. What is an expression for the total cost of fruit purchased? Also, what is the total cost of 7 apples and 4 oranges?
What is 2x+3.50y=c ; $28.00
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 about the ground is the elevator now?
What is 465.2 feet.
Solve: b/8=9/4
What is b=18.
Solve: 3< x + 4 < 10
What is -1< x < 6.
You downloaded 2 DVDs and 10 songs for $18. Your friend downloaded 3 DVDs and 15 songs for $27. Write a system of linear equations that represents this situation. Can you determine the price of each DVD and each song? Explain.
2x + 10y= 18
3x+ 15y = 27
no; Equation 2 is a multiple of equation 1, so there are infinitely many solutions.
A rectangular banner is 16 feet long and has an area of 80 square feet. What is the perimeter of the banner?
What is 42 feet.
True or False: If a number is positive, then its opposite is negative.
What is True.
Graph: y=-x+7
What is look at graph.
Solve and Graph your solution: h + 7 < or -9h< -45
h< -2 or h>5
You need to rent a bowling lane. On Friday nights, you have two options. Option A is a $20 lane rental plus $3 per game. Option B is a $35 lane rental with a maximum of 10 games. For what number of games is the total cost the same for each option?
What is 5 games