Find the slope of the line that goes through the points (2, 7) and (4, 14)
m = 7/2
10=7-m
m=-3
26-4s=9s
Solve for y: y-3x = 13
y=3x+13
What acronym do we use to remember the order of operations?
PEMDAS
m= -2 b= 5
36=13a-4a
a=4
5p-9=2p+12
p=7
Solve for x: 20x+5z=15
z= -4x+3 or z= (15-20x)/5
What is the inverse of multiplying by a fraction?
Multiplying by the reciprocal
Johnny collects baseball cards. He was given 10 to start with. Every week he collects 3 more cards. Write the equation that represents the situation.
y=3x+10
2g-13=3
g=8
10(g+5)=2(g+9)
g= -4
Solve for e:
-1/4e=-11
e=44
Solve for n: 3(-4n-6)= -2(6n-9)
No Solution
What is the equation of the graph below:
y= -4
Find the error in the following:
Equation: -2(7-y)+4= -4
Step 1: -14-2y+4= -4
Step 2: -10-2y= -4
Step 3: -2y= 6
Step 4: y= -3
Distributed incorrectly: -2 times -y should be +2y (step 1)
Find the error in the following:
Equation: 6(2y + 6) = 4(9 + 3y)
Step 1: 12y + 36 = 36 + 12y
Step 2: 12y = 12y
Step 3: 0 = 0
Step 4: No solution
The equation has infinitely many solutions instead of no solution.
Find the error in the following when solving for x:
Equation: 12 – 2x = -2(y – x)
Step 1: -2x = -2(y – x) – 12
Step 2: x = (y – x) + 6
x is still on both sides of the equation
Four times the difference of x and 7 is 12. Solve for x.
4(x-7)=12
x=10
What is the equation that represents the graph below?
y=-2/3x+5
Using the picture below, what are the dimensions of the court if the perimeter is 228 feet? (Hint: P=2L+2W) (State the length and width.)
36 feet & 78 feet
Write and solve an equation to find at how many months will the price of each internet company be equal.
5 months
Solve for m: y=mx+b
m=(y-b)/x
Solve the equation for x: a=bx+cx+d
x= (a-d)/(b+c)