Question

4: 2 cups of sugar is used to make enough lemonade for 6 people. How much sugar is needed to make enough lemonade for 18 people?

Question #6: 12 cans of soup cost $20. What is the cost for 30 cans? *

Question #7: It takes 30 minutes for an author to type 4,500 words. How many words can she type in 3 hours?

Question #8: A concession stand made $45 from the sale of 15 cheeseburgers. If 100 cheeseburgers are sold, how much do they make? *

Answer 1

4. 6 cups

6. 50 dollars

7. 27000 words

8. 300 dollars

Explanation:

4.

2 cups x cups

-------------- = -----------

6 people 18 people

Using cross products

2 * 18 = 6x

Divide by 6

36/6 =6x/6

6 =x

6.

12 cans 30 cans

-------------- = -----------

20 dollars x dollars

Using cross products

12x = 20*30

12x = 600

Divide by 12

12x/12 =600/12

x = 50

7.

3 hours = 3*60 minutes/hour = 180 minutes

30 minutes 180 minutes

-------------- = -----------

4500 words x words

Using cross products

30x = 4500*180

Divide by 30

x = 4500*180/30

x=27000

8.

45 dollars x dollars

-------------- = -----------

15 burgers 100 burgers

Using cross products

45*100 = 15x

Divide by 15

45*100/15 = x

300 =x