Equations
3x - 15 = -21
x= -2
What is the y-intercept of y=4x-5
(0,-5)
factor x^2 +10x + 16
(x + 8)(x + 2)
Give an irrational number between 5 and 6
answers will vary
solve x+5/12 = x-2/8
No solution
-4( 2 - x) = 24
x = 8
Write an equation parallel to y=3/4 x -3 and contains the point ( 0,5)
y = 3/4 x + 5
factor x^2 - 49
(x + 7)(x - 7)
simplify square root of 64 x^2 y^2
8xy
Paco went to the movies. He spent a total of $50. He spent $10 on food and saw 8 movies. How much did each movie cost?
$5 per movie
4x + 3( x-2) = 5x - 20
x = -7
What is slope of equation perpendicular to
2x -5y = 6
-5/2
Use the distance formula to find the distance of
( 5,9) and (-7,-7)
hint: square root of (x2-x1)2 + (y2-y1)2
20
You purchase a stereo system for $830. There was a discount of 20% off. How much did you pay after the discount?
$664.00
2x + 3 < -5x -4
x < -1
Find the slope of (-1,5) and (3,9). Then use point slope form to write an equation in slope intercept form.
y = x + 6
factor 2x2 -11x -21
(2x + 3) ( x -7)
What is the quadratic formula and why do you use the quadratic formula?
-b +- the square root of b2 -4ac divided by 2a to find the x-intercepts or roots of an equation
***b2 -4ac this is called the discriminant; it tells how many solutions you will have.
At a baseball game, Jose bought five hot dogs and three sodas for $17. At the same time, Allison bought two hot dogs and four sodas for $11. Find the cost of one soda.
soda $1.50
Find 3 consecutive integers whose sum is 48.
( hint: use x, x+1, x+2 in your equation)
15,16,17
A business purchases a computer for $2000. The value of the computer depreciates $400 per year. Write a linear equation gives the value y of the computer after x years?
y = 2000 - 400 x
What is the area of a rectangle with a length of 2x+5, a width of 3x
6x2 +15x
Find the discriminant of x2-5x+6
1