Addition/Subtraction Equations
x + 32.5 = 33.5
x = 1
x = 21
What is the mode?
The number in the data set that occurs the most.
Estimate by clustering:
23.03 + 22.94 + 24.1 + 22. 74 + 23.4
23 times 5 = 115
What is the perimeter of a rectangle whose length is 12.5cm and width is 7.25cm ?
39.5 cm
x - 15.67 = -5.32
x = 10.35
x / 5.6 = -13.7
x = - 76.72
How do you find the median when there is an even number of data values?
Add the middle two values and then divide by two, finding the average :)
Estimate using front - end estimating:
12.83 + 7.36
12+7 = 19
.8 + .4 = 1.2
19 + 1.2 = 20.2
What is the area of a rectangle whose length is 13.5cm and width is 6.4cm?
86.4 cm squared
x + 77.02 = 64.9
x = -12.12
-7.5x = -67.5
x = 9
How does an outlier affect the mean ?
It will either cause it to be higher or lower than the actual average.
Round to the hundredths place:
13.457
13.46
Using the distance formula, solve the following:
d=rt
If a rabbit hops at a speed of 7.8 m/s, how far will the rabbit hop in 25 seconds?
195 meters
x - 8.246 = -12.357
x = -4.111
x / 11.11 = -6.1
x = - 67.771
Find the median of the follow data values:
11.2 , 10.95, 15.7, 14.1 , 12.3, 9.75
11.2 + 12.3 = 23.5
23.5 / 2 = 11.75
Answer: 11.75
Estimate the product:
(-4.56)(12.2)
-60
Using the Fahrenheit formula, solve the following:
F = 1.8C + 32
If the temperature in Tuxedo Park is 30 degrees Celsius , what is the temperature in Fahrenheit?
86 degrees Fahrenheit
9.2 = x - 17.85
x = 27.05
-3.6x = 4.428
x = - 1.23
Find the mean of the following test scores:
85%, 92%, 88%, 93%, 82%
88%
Estimate the quotient:
(-33.1) / (7.6)
-32/8 = -4
What is the formula for time ?
distance / rate = time