Algebra 1 Quiz 3
Algebra 1 : Section 3.5-3.7 Review
SHOW ALL WORK
Solving Proportions
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|[pic] |[pic] |[pic] |
Solving Percentages
|Method 1 |Method 2: |
|1) Set up a proportion |Translate the percentage statement:: |
|[pic] |1) Replace the % with a decimal- change into a decimal by moving|
| |the decimal 2 space to the left. |
|2) Solve by finding the cross-product |2) Replace “What” with a variable |
| |3) Replace “is” with = |
| |4) Replace “of” with multiplication (x) |
|What % of 150 is 72? |What number is 46% of 55? |
|What % of 56 is 21? |What % of 60 is 18? |
STORY PROBLEMS
Ratios: Solve using method of choice.
|At a pet show, the ratio of dogs to cats is 4:3. If the number of cats is 45,|Part of a telephone pole is underground. The ratio of the part underground to|
|find the number of dogs. |the part above ground is 3:7. If the part above ground is 30 feet, how long |
| |is the part underground? How tall is the whole pole? |
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|Percentages: Solve each problem using either method 1 or method 2 | |
|The total bill at a restaurant came to $64. You left a tip of $10. What |A store had all the music CD’s on sale for 33% off the regular price. What is|
|percent of the total was your tip? |the sale price of a CD with a regular cost of $17? |
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