Simple Equations
x - 10 = 20
x = 30
2x + 3 = 11
x = 4
7x - 4 = 20 + 3x
x = 6
2/r = 12/18
x = 3
Mrs. Kincaid has 122 students in 5 classes. Estimate how many students Mrs. Kincaid has per class.
About 24 students per class (25 would also be ok)
3 + x = 7
x = 4
103 = 3x + 10
x = 31
-5 = 25 - 9x - 6x
x = 2
5/15 = 30/x
x = 90
Mrs. Kincaid bought 5.3 pounds of apples for $11.45. Estimate what the price per pound of apples is. Round to the nearest penny.
About $2.16 per pound
-5x = 35
x = -7
x/4 - 5 = 20
x = 100
4x + 1 - 8x = 37
x = -9
10/x = 25/60
x = 24
An object weighs exactly 9 pounds. Madley measures the object to weigh 9.014 pounds and Zoey measures the object to weigh 8.97 pounds. Who has the most accurate measurement?
Madley
x/10 = 5
x = 50
50 = x/3 + 40
x = 30
27 - 7x = 2x
x = 3
A woman is 5'0 and casts a shadow of 12 feet. How tall is a tree if it casts a shadow of 36 feet?
15 feet
An object weighs exactly 11 pounds. Sarah measures the object to weigh 11.0284 pounds and Austin measures the object to weigh 10.98 pounds. Who has the most accurate measurement?
Austin
5 - x = 11
x = -6
-20 = 1/2x + 10
x = -60
4(2x - 5) = 3x + 10
x = 6
Convert 20 Meters to millimeters
1 meter = 100 cm
1 cm = 10 mm
20,000 mm
There are 87 homes in the neighborhood The water usage for the neighborhood last month was 7,488. ESTIMATE the water usage per home.
About 86 gallons per home