Answers:
Example #1: 60 yds x 100 yds
Example #2: NHL $41.19, NBA $45.92
Example #3: 5 oz of 5% & 5 oz of 12.5%
Example #4: car is 80km/hr; truck is 72km/hr
Example #5: 12 honey, 4 sunflower, 7 French
Example #1, page 294
A soccer field may have a width beteeen 50 and 100 yards and a
length between 100 and 130 yards.
Suppose a soccer field has a perimeter of 320 and its length
measures 40 yards more than its width. What are the dimensions
of the field?
Example #2, page 295
In 2005-2006 two NHL and one NBA tickets cost $128.30, but one
NHL and two NBA tickets cost $133.03. (These are average
prices.) What were the prices for one NHL ticket and one NBA
ticket?
Example #3, page 296
How many ounces each of 5% hydrochloric acid and 20%
hydrochloric acid must be combined to get 10 ounces of
solution that is 12.5% hydrochloric acid?
Example #4, page 297
A car travels 250 km in the same time that a truck travels 225
km. The speed of the car is 8km/hr faster that the speed of the
truck. Find the speeds of the car and truck?
Example #5, page 299
At Panera Bread, a loaf to honey wheat bread costs $2.95, a
loaf of sunflower bread costs $2.99, and a loaf of French
bread costs $5.79. Recently three times as many loaves of
honey wheat bread were sold as sunflower bread. The
number of loaves of French bread sold was 5 less than the
number of loaves of honey wheat bread sold. Total receipts
for these breads were $87.89. How many of each type of
bread were sold?
Problem #6, page 301 (answers CA $249B, Mex $137B)
In 2007, US exports to Canada were $112 billion more than
exports to Mexico. Together, exports to these two countries
totaled $386 Billion. How much were exports to each country?
Problem #20, page 303 (answer is 6L of pure antifreeze)
A truck radiator holds 36L of fluid. How much pure
antifreeze must be added to a mixture that is 4%
antifreeze to fill the radiator with a mixture that is 20%
antifreeze?