They are on the back table.. Write and solve an equation. 1. A mother holds her baby and stands on a scale. The scale reads 147 lbs. The mother weighs.

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Presentation transcript:

They are on the back table.

Write and solve an equation. 1. A mother holds her baby and stands on a scale. The scale reads 147 lbs. The mother weighs 129lbs. How much does the baby weigh? Answer: 18 lbs. 2. The average rainfall in Houston is about 5.2 times that of El Paso. If Houston gets 46 inches of rain, what will El Paso’s rainfall be? Round to the nearest tenth. Answer: 8.8 inches

3. You just got a job as a carpenter. You earn $ for working 17 hours. What is your hourly wage? Write an equation and solve. Answer: $6.25 Solve the equation. Check your solution! 4. x/5 = 100 Answer: x = m/3 = -6 Answer: m = r/3 = -101 Answer: r = 303

Solve: 7. 5x = - 75 Answer: x = = -2m Answer: m = n = -5 Answer: n = -5/9 10 7/8 w = 14 Answer: w = 16

11. 4/7 m = 8 Answer: m = /11 n = 3 Answer: n = 6 3/ /6 m = 12 Answer: m = -72 Write an equation and solve: 14. A cell phone plan costs $39.95 per month. The first 500 min. are free. Each minute after that costs $0.35. The bill totaled $ How many minutes did they go over 500? Write an equation and solve. Answer: 85 min.

15. You are helping to prepare a meal. You can peel 2 potatoes per minute. You need 30 potatoes. How long will it take you to finish if you have already peeled 9? Answer: 10 ½ min. Solve: 16. 2n – 5 = 7 Answer: n = = 2n + 1 Answer: n = 4 ½ = 3 + 5x Answer: x = 6 2/5

Pythagorean theorem Determine whether the lengths can be a side of a right triangle ft, 12ft, 15ft Answer: yes 20. 2m, 4m, 5m Answer: no 21. 1in, 2in, 3in Answer: no 22. Answer: c = 17 m ? 8m 15m

23. A carpenter is building a rectangular fence for a playground. One side of the playground is the wall of a building, which is 70 ft. wide. He plans to use 340 ft. of fencing material. What is the length of the playground if the width is 70 ft? Answer: 135 ft. Solve: = -3 + n + 2n Answer: n = x = 3x – 7 = 29 Answer: x = 9

= 8( x + 2) Answer: x = m + 5(m -1) = 7 Answer: m =2 Variables on both sides: 28. 6x + 3 = 8x – 21 Answer: x = k -4 = 5k + 16 Answer: k = 10

Central Tendency: Find the mean, median, mode and range. 30. Time spent on the internet in min/day. 75, 38, 43, 120, 65, 48, 52 Answer: Mean - 63, Median - 52, Mode - none, Range - 82, best tendency - Mean 31. Write and solve an equation to find x 80, 93, 91, x, mean = 90 Answer: x = 96

Solve the following equations. Check your solution! = -a + 16 Answer: a = = -z -3 Answer: z = = -x + 8 Answer: x = -1