+ & - Integers
-32 + 18=
-14
-8 x 12=
-96
What is a complex fraction?
fraction on top of a fraction
7 - 3(4 - 2y) - 10y
3x4=12
3x-2y=-6y
7 - 12 - (-6y) - 10y= 7 + -12 + 6y + -10y
-5 + -4y
90 degrees
19 - 23=
-4
-48/6
-8
Alexis washes 10.5 windows in 3/4 hour. At this rate, how many windows can she wash in one hour?
10.5/.75= 14 windows/1 hour
-3x + 5(x + 2)
-3x + 5x + 10
2x + 10
Find the area of a circle is the radius is 5 inches
78.5
24 - (-6) - 6=
24
2 x 25=
50
One of the highest snowfall rates ever recorded was in Silver Lake, Colorado, in April 1921, when just over 7 feet of snow fell in 27.5 hours. What was that rate in inches per hour?
12 inches=1 foot
12x7=84 feet
84/27.5=3.054 repeating
An amusement park reduced its admission price to $15.50 per day, but now charges $1.50 per ride. Mark has $26 to spend on admission and rides. Write and solve an equation to find how many rides Mark can ride in one day.
Let r=number of rides Mark rides in one day
1.50r + 15.50 = 26
r=7 rides in one day
(2x+1) + (x-7) = 180
x=62
A helicopter is 19 meters above the top of a canyon wall. It goes down 27 meters, passing into the canyon, and then goes up 5 meters. What is the new position of the helicopter relative to the top of the canyon wall?
The helicopter is -3 meters from the top of the canyon wall.
The lowest elevation in Long Beach, California, is 7 feet below sea level. The elevation of Death Valley is about 40 times lower than the elevation of Long Beach. What is the approximate elevation of Death Valley?
-280 feet
What two things must a graph have in order to be proportional?
straight line
go through the origin (0,0)
200 - 4.5x < 20
x>40
x + (x+14) = 90
x=38
-75 meters
Marc's elevation decreases by 350 meters as he rides his bike down to the bottom of a hill. He did the ride in 5 equal stages. How much did Marc's elevation change during each stage?
-70 meters
Tony sells sporting goods. He makes a 10% commission on every dollar of sales that he makes. One month Tony got a commission check for $2,500. What were his sales in dollars that month?
10/100=2,500/x
cross multiply
100x2,500=250,000
250,000/10= 25,000
10p+1=5
p=0.4
Find the circumference of a circle if the diameter is 30
94.2