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Do Now 10/13/09

Do Now 10/13/09. Take out HW from last night. Text p. 165, #28-34 even, #46-50 even Text p. 171-172, #16-38 even Copy HW in your planner. Text p. 179-181 #4-36 even

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Do Now 10/13/09

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  1. Do Now 10/13/09 • Take out HW from last night. • Text p. 165, #28-34 even, #46-50 even • Text p. 171-172, #16-38 even • Copy HW in your planner. • Text p. 179-181 #4-36 even • If you are shopping in the mall and see that a shirt is on sale for 40% off, what does that mean? If the price of the shirt is $30 how much will it cost you to purchase it?

  2. Homework Text p. 165, #28-34 even, #46-50 even • 28) 4/12 = n/3; n = 1 • 30) t/21 = 40/28; t = 30 • 32) 3.3 • 34) 2 • 46) 7/8 • 48) 3/5 • 50) 21 pages

  3. Homework Text p. 171-172, #16-38 EVEN • 16) D • 18) Distribute the 14 to both b and 2; 18b = 14b + 28, 4b = 28, b = 7 • 20) 2 • 22) 22 • 24) -2.5 • 26) 5.2 • 28) 7.4 • 30) -7.1 • 32) Decreases; as k gets larger, the value of (k/14) get larger. Therefore h must get smaller so that (5/h) will get larger. • 34) 18 min • 36) 48 km • 38) 70.5 km

  4. Objective • SWBAT solve percent problems

  5. Percent- means ‘per one hundred’ or divided by 100. How many cents are there in a dollar?

  6. Percent Problems Using Proportions- You can represent “a is p percent of b” using the proportion where a is a part of the base b and , or p%, is the percent.

  7. Try It Out… What percent of 25 is 17? Write a proportion where 25 is the base and 17 is a part of the base. Percent proportion Substitute and then cross multiply 17 is 68% of 25

  8. Try It Out… What percent of 136 is 51? Write a proportion where 136 is the base and 51 is a part of the base. Percent proportion Substitute and then cross multiply 51 is 37.5% of 136

  9. Percent Problems Using Equations- You can represent “a is p percent of b” using the equation where a is a part of the base b and p%, is the percent.

  10. Try It Out… What number is 15% of 88? Use an equation where 15% is the percent and 88 is the base. Percent equation Substitute and then solve the equation 13.2 is 15% of 88

  11. Try It Out… 20 is 12.5% of what number? Use an equation where 12.5% is the percent and 20 is a part of the base. Percent equation Substitute and then solve the equation 20 is 12.5% of 160

  12. What Have We Learned…

  13. What Happens When Cupid Shoots an Arrow? He Mrs. Someone

  14. Homework Text p. 179-181 #4-36 even

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