*
1.3: Solve Linear Equations
Hw tonight: none
HW Monday: p.21-23 (12 – 48 every
other even, 68, 70)
*What is an equation?
*What are the different types of solutions
you can have when solving an equation?
*
1.) 7x – 41 = -13
4
2.) x  8  20
5
*
1.) 5w + 2 = 2w + 5
2.) 12(r + 3) = 2(r + 5) – 3r
*
3.) 1 t  1 t  10
2
3
*
*The bill for the repair of your bicycle was $180.
The cost of parts was $105. The cost of labor was
$25 per hour. How many hours did the repair work
take?
*
*You have two summer jobs. In the first job, you
work 25 hours per week and earn $7.75 per hour.
In the second job, you earn $6.25 per hour and
can work as many hours you want. You want to
earn $250 per week. Write an equation and find
how many hours you must work at the second job.
1.) 2(b + 3) = 4b – 2
3
2 4
1
w  w
3.)
7
9 9
7
2.) 2x – 3 = 6x + 25
*
1.) 0.6x + 0.5 = 2.9
3.) 3.8w + 3.2 = 2.3(w + 4)
3
2
4
1
2.) w   w 
7
9 9
7
*
1.4: Rewrite Formulas & Equations
*
1.) Solve A = lw for l. Then find the length of
a rectangle with a width of 50 mm and an
area of 250 sq. mm.
*
2.) Solve A = ½ (b1 + b2)h for h.
*
1.) 4y + x = 24; x = 8
2.) 15x + 4y = 9; x = -3
*
*The formula for converting temperatures from
degrees Celsius to degrees Fahrenheit is
F = 9/5C + 32. Solve the formula for C. Then find
the temperature in degrees Celsius that
corresponds to 50 degrees Fahrenheit.
*
*A tuxedo shop rents classic tuxedos for $80 and
designer for $150. Write an equation that
represents the shop’s revenue. The shop owner
wants $60,000 in revenue during prom season.
How many designer tuxedos must be rented if the
number of classic tuxedos rented is 600? 450? 300?
*
1.) 6x + 5y = 31
2.) 9x – 6y = 63