### Slide 1

p.341: 7
The Strauss family is deciding between two lawn-care service. Green Lawn charges a \$49 startup fee, plus \$29
per month. Grass Team charges a \$25 startup fee, plus \$37 per month.
a.
In how many months will both lawn-care services cost the same? What will that
cost be?
3 months; \$136
b.
\$247.
If the family will use the service for only 6 months, which is the better option?
Explain.
Green Lawn; for 6 months. Green Lawns service costs only \$223, while Grass
Team's costs
p.340: 17
Casey wants to buy a gym membership. One gym has a \$150 joining fee and costs \$35 per month. Another gym
has no joining fee and costs \$60 per month.
a.
In how many months will both gym memberships cost the same? What will that
cost be?
6 months; \$360
b.
If Casey plans to cancel in 5 months, which is the better option for him?
Explain.
The second option; for 5 months. It costs only \$300, while the other option costs
\$325.
p.341: 24
Justin and Lacee are taking a walk. Justin walks at a rate of 6 ft/s, while Lacee walks at 4 ft/s. Lacee starts 10
a.
After how many seconds will Lacee and Justin be next to each other? What
distance be?
will that
5 s; 30 ft
b.
Justin?
16s
How many seconds will it take for Justin to catch up to Lacee if she starts 32
p.341: 27
Helene invested a total of \$1000 in two simple interest bank accounts. One account paid 5% annual interest; the
other paid 6% annual interest. The total amount of interest she earned after one year was \$58. Write and solve a
system of equations to find the amount invested in each account.
x + y = 1000
0.05x + 0.06y = 58
\$200 at 5%
\$800 at 6%
p.341: 32
Tricia and Michael share a cell phone plan. Together, they made a total of 52 calls last month for a total of 620
min. Tricia averaged 15 min for each of her calls, while Michael averaged 10 mins.
a.
How many calls did Tricia make last month? Michael?
20; 32
b.
How many calls did Tricia make if the total number of calls was 60?
p.341: 35
At a school store, Juanita bought 2 books and a backpack for a total of \$26 before tax. Each book cost
\$8 less than the backpack.
a.
Write a system of equations that can be used to find the price of each
price of the backpack.
book and the
2x + y = 26
x=y-8
b.
Solve the system by substitution.
book \$6; backpack \$14
c.