JAMES MARTIN MIDDLE SCHOOL MATH DEPARTMENT 2011-1212
Name_________________________________________________________________ DATE____________________
Test #2 INV3 Practice Test C&S WORK MUST BE SHOWN FOR CREDIT
Unit Rate 5/5 = A 4/5=B <or = 3/5 = NY
The school newspaper club votes to have a picnic for its 30 members. The picnic planners investigate prices for food and drink at two stores and list their findings in a table.
Food and Drink Prices
1. How much does it cost to make 30 hamburger patties with ground beef purchased from Streamline? Show your work.
$10.43;
4 burgers cost $1.39, 1 burger costs $0.3475,
30 burgers X $0.3475/burger =$10.425, or $10.43 30 burgers/10 per pound = 7.5 pounds,
7.5 pounds x $1.39/pound =$10.425, or $10.43
2. How much do 30 hamburger patties cost at Bucky’s? Show your work.
$14.97; 10 patties for $4.99; 30 patties for $14.97
3. Which store offers the better buy for cola? Explain.
Bulky; at Streamline, 6 cans cost $1.99, so 24 cans for $7.96; at Bulky, 24 cans cost $6.99
4. The planners need to purchase enough hamburger buns to make 30 sandwiches. Buns come in packages of 8 or 12, depending on where they shop. Which store offers the better buy for the hamburger buns? How much do they cost at that store? Explain.
Streamline OR buying from both; at Streamline, 8 buns cost $1.49, so 32 buns cost $5.96 while at Bulky, 12 buns cost $2.09, so 36 buns cost $6.27; two 12-packs from Bulky for $4.18 + one 8-pack from Streamline for $1.49 = 32 buns for $5.67.
5. The meal at the picnic will include:
• one 12-ounce can of cola
• one hamburger with bun
• one small bag of potato chips (10.5 ounce bag)
The school cafeteria will donate mustard, ketchup, relish, onions, paper plates and napkins. The picnic planners will buy each item at whichever store has the better price. All 30 members of the newspaper club will attend the picnic.
How much should the students charge each person in order to cover the food expenses? Show how you determined the amount.
If students buy the same item at different stores to save as much as possible, see Figure 1. 51.39/30 people = $1.713, or about $1.72 per person.
If students do not think they can buy the same item at different stores to save as much as possible, see Figure 2 on the next
page. $53.04/30 people= $1.768, or about $1.77 per person.
Figure 1
Figure 2
Equations 5/5 = A 4/5=B <or = 3/5 = NY
Re-write each equation, replacing the variable with a number that makes a true statement
1. 49×n=113 49 ×3=113 so n = 3
2. n x 2.25 = 90 40 x 2.25 = 90
3. n ÷15 =120 1800 ÷15 = 120
4. 180 ÷ n = 15 180 ÷ 12 = 15