Function vs Not a Function
Is the following relation also a function??
{(10,9), (-2, -16), (-6,7), (5,8), (8,-16), (-11,9)}
Yes
In the acronym DCODE, The "C" stands for what step in solving the equations?
Combined "Liked" terms
True or False
All linear equations has a power greater than 1.
FALSE - all linear equations must have a power no greater than 1
What type of transformation would result in a mirror image of the pre-image?
A reflection
Rewrite this systems of equations so that you can use method of elimination to solve.
4x + 2y - 5 = 0
2x - 2y = 25
4x + 2y = 5
2x - 2y = 25
add 5 to both sides in the first equation
Is the following relations a function?
{(15,3), (-6,9), (-3,0), (-6, 3), (-1,16)}
No, because x=-6 repeats and has two different y- values.
What is the inverse operation for raising a number/variable to a certain power?
Taking the square root
Honey, I shrunk the kids was a movie which depicted what type of transformation?
Dilations
What is the solution for the following system of equation? (the point where the equations intersect)
4x + 2y = 5
2x - 2y = 25
(5, -7.5)
Define in your own words, what is a function?
Ex. A function is for every x (input) value there is one and only one distinct y (output) value.
What is the solution of 3x + 2 = 7x
x = 1/2
Alfreda and Angelina sells tickets to your school play and collects $104. Admission prices are $6 for adults and $4 for students. They sold 21 tickets in total. How many of each type of ticket did Alfreda and Angelina sell?
11 adult tickets x=#of adult tickets
10 student tickets y = # of student tickets
x + y = 21
6x + 4y = 104
The following ordered pairs represent a function. What ordered pair can be added to the given set and still represent a function?
{(-3,-1), (-2,0), (0,3), (2,2), (4,3)}
a) (2,-3) c) (-1,4)
b) (-3,2) d) (0, -2)
C (-1,4) would keep the given relation a function since x=-1 is not repeating
Solve the following for r:
−3(4r − 8) = −36
r = 5
A cone has a radius of 3 inches and height of 4 inches. What is the slant height in inches ? (hint: makes a right triangle)
Pythagorean theorem used
3^2 + 4^2 = c^2
9 + 16 = c^2
25 = c^2
5 = c
a vertical line test
Solve the following for x:
2x + 1/2(2x - 4) = 4
x = 2
A building whose height is 12 ft. has a ladder leaning against it. The ladder is placed 5 ft, away from the side of the building. What is the length of the ladder?
12^2 + 5^2 = c^2
144 + 25 = c^2
169 = c^2
13ft = c