Evaluate formulas by substituting in given values
Example:
Jennifer has a jewelry box in the shape of the rectangular prism shown below.
The volume of the jewelry box is 96 in.3. What is the height of the box?
Answer: ______inches
Practice:
1)The perimeter of a rectangle measures
41 in. The length measures 8.25 in. What
is the measure of the width?
Show your work.
Answer: ______inches
2) Robert drew a diagram of his triangular garden.
a)Estimate the area, in square meters, of Robert's garden.
Estimation ______square meters
b)On the lines below, explain how you estimated the area.
______
______
Name ______Date ______
PRACTICE – Evaluate formulas(Math 7)Use your calculator!
3) One tissue box has a volumeof 128 in3.
The height of the box measures 4 in. and the
width of the box measures 4 in. Find the
measure of the length.
Answer: ______inches
4) Diego has a stained glass window with one triangular
piece, as shown. The areaof the triangular piece is 24 in.2.
What is the measure of the height of the stained glass piece?
Answer: ______ft.
5) The cube, at the right, has sides which measure 6.4cm.
Estimate the volume of the cube.
Show your work.
Answer: ______inches3
On the lines below, explain how you estimated the volume.
______
______
6) What is the volume, in cubic inches, of the rectangular prism below?
Show your work.
Answer: ______inches3
7) You can use the following formula to find the perimeter of a rectangle: P = 2l + 2wFind the measure of the length (l) if the perimeter measures 56 ft, and the width (w ) measures 15 ft.
Show your work.
Answer: ______ft. / 8) The length of a rectangle measures
8.3 meters and the width measures 4.7 meters.
Estimate the perimeter of the rectangle.
Show your work.
Answer: ______meters
Explain how you estimated the perimeter:
9) The trapezoid below has an area of 91 cm.2. The measures of the basesare 12 cm and 14 cm.Find the measure of the height.
Show your work.
Answer: ______cm. / 10) The trapezoid below has an area of 87 cm.2. The measure of the smaller base is 11 cm and the height is 6 cm. Find the measure of the larger base.
Show your work.
Answer: ______cm.
Are you ready for a challenge?
11) The area of a triangle measures 18 in.2. the base and the height have the same measure. Find the base and height of the triangle. / 12) You can use either of the two following formulas to convert between the Fahrenheit and Celsius temperature scales:F = C + 32 or C = (F – 32)
( C = ˚Celsius and F = ˚Fahrenheit)
You wish to convert 50˚F to ˚Celsius.
a)Which formula will you use?
b)Use the formula find the conversion.
Evaluate formulas by substituting in given values
Example:
Jennifer has a jewelry box in the shape of the rectangular prism shown below.
What is the volume, in cubic inches, of Jennifer’s jewelry box?
4) One tissue box has a volumeof 128 in3.
The length of the box measures 8 in. and the
width of the box measures 4 in. Find the
measure of the height.
Answer: _4___inches
5) The cube, at the right, has sides which
measure 6 inches. Find the volume of
the cube.
Answer: __216_inches3
6) What is the volume, in cubic inches, of the rectangular prism below?
Answer: _120__inches3