Solve Equations
Algebra: Is this a function: {(1, 2), (2, 3), (2, 4)}
No
What is the equation in point-slope form for the line that passes through (3, 1) and has a slope of 2?
y - 1 = 2 (x - 3)
Find the slope:
2(3x - y) = -10
3
Solve for y:
3x + 4y = -36
y = -3/4x - 9
Is the sequence an arithmetic sequence? If so what is the common difference?
77, 64, 51, 38, 25
yes, -13
What letter does every odd number have in it?
E
What is the domain of the function:
(-5, 10) , (-2, 11) , (1,4) , (5, 10)
{-5, -2, 1, 5}
Write the following equation in slope-intercept form: 5(x + 2y) = 20
y = -1/2x + 2
What is the slope of the following equation:
2x + 2y = 8
slope = -1
Solve for x:
w=x/(a-b)
x=w(a-b) or x=wa-wb
an = an - 1 + d
what is the longest side of a right triangle called?
hypotenuse
Find the value of f(5) in the below function
f(x)=6 + 3x
f(5) = 21
What is the equation of the line that passes through (-2, -1) and (0, -5) in slope intercept form?
y=- 2x - 5
What is the slope of the equation
-2x + 5y = -4
2/5
The sum of three consecutive odd integers is 57. What are the three integers?
17, 19, 21
What is the explicit formula?
an = a1 + (n - 1) d
How many seconds are in one day?
86,400
What is a function called if no two elements of the domain map to the same element in the range?
one-to-one
What is the standard form of the equation:
y = 4x - 18
4x - y = 18
Becky is competing in an 8-mile road race. She runs at a constant speed of 6 mi/h. If you wrote a linear equation to represent how much she has LEFT to run what would be the slope?
-6
Simplify:
-(x + 7) -2(4x + y)
-9x -7 -2y
What is the explicit formula for the recursive:
an = an - 1 + 15; a1 = 8
an = -7 + 15n
What is the only number that doesn't have a Roman Numeral?
0
Solve: 21 + x = 2(x - 6)
x = 33
What is a reasonable domain and range for the function:
Tickets to a sporting event cost $65
range: multiples of 65
Are the following equations parallel, perpendicular or neither?
y = 2x + 1
2x -y = 3
parallel
What's the slope of the line passing through (3,9) (5,4)
slope: -5/2
Simplify:
1/4(-4 + 16x) - 2/5(20x - 15)
5 - 4x
What are the first 4 terms in the sequence:
an = 5 + 7n
12, 19, 26, 33
Answer the riddle: I am an odd number. Take away one letter and I become even. What number am I?
seven