EXPRESSIONS, EQUATIONS, AND FUNCTIONS
4(6n+7) when n=6
What is 172.
Evaluate
11-(the 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 that passes through the point (-2,9) and has slope -2.
What is y=2x+5 (slope-intercept form)
Or y-9=-2(x+2) (Point-slope form)
Solve the linear system: 5x+y=4, 6x-y=7
What is x=1, y=-1 or (1,-1)
Write as an expression
3 times the difference of a number m and 15 is equal to 30
What is 3(m-15)=30.
Simplify: -7x(x-13)
What is -7x^2+91x.
X-intercept and Y-intercept: -2x+5y=-20
What is x-intercept=10; y-intercept=-4
Write an equation, in standard form, of the line that passes through the two given points: (3,9) (1,1).
What is -4x+y=-3.
Graph: x>4
Graph the line x=4, dotted line
Shade to the right
Is x=8 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.
Graph: y=4x-3
Graph must have a slope of 4 and a y-intercept of -3
Is the ordered pair (8,5)a solution to the linear system?
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
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 proportion: b/8=9/4
What is b=18.
Solve: x-2+6=9
What is x=5
Graph: x<3, y>1, then identify where the solutions would be.
Graph x=3, shade left, dotted line
Graph y=1, shade top, dotted line
Solutions would be in the double shaded or overlapping shaded area
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
Graph must have a slope of -1 and y-intercept at 7.
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.
Solve the linear system: 2x+9y=16, 5x=1-3y
What is x=-1;y=2 or (-1,2)