September 28, 2015
HAPPY
MONDAY !!!!
Objective: Solve equations for a given variable and
use formulas to solve real-world problems
Assignment: p. 128 # 8-17
September 28, 2015
Warm-up:
3x + 8 = 29
5r - 6 = 19
2
a -5=9
6
September 28, 2015
Literal Equation:
September 28, 2015
Solve each equation for the variable indicated.
4m - 3n = 8 for m
15 = 3n + 6p, for n
September 28, 2015
k - 2
5
= 11j for k
28 = t ( r + 4 ) for t
September 28, 2015
a ( q - 8 ) = 23, for q
d + 5c = 3d - 1 , for d
September 28, 2015
2w - y = 7w - 2 , for w
3m + y = 5 + 5m , for m
September 28, 2015
Literal Equations - an equation that involves several
variables (a.k.a. formula)
The formula for the volume of a rectangular prism is V = lwh,
where l is the length, w is the width, and h is the height
a) solve the formula for w
b) Find the width of a rectangular prism that has a volume of 79.04
cubic centimeters, a length of 5.2 centimeters, and a height of 4
centimeters.
September 28, 2015
A car's fuel economy E (miles per gallon) is given by the
formula E = m/g, where m is the number of miles drive and g is
the number of gallons of fuel used.
a) Solve the formula for m.
b) If Steven's car has an average fuel consumption of 30 miles
per gallon and he used 9.5 gallons, how far did he drive?
September 28, 2015
The water pressure on a submerged object is given by
P = 64d, where P is the pressure in pounds per square foot,
and d is the depth of the object in feet.
a) Solve the formula for d.
b) Find the depth of a submerged object if the pressure is 672
pounds per square foot.