7.5 Real World Algebraic Problems

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Presentation transcript:

7.5 Real World Algebraic Problems

Example 1 1. a)What is the perimeter of the triangle? b) The perimeter of a trapezoid is 7cm shorter than the perimeter of the triangle in part A. Find the perimeter of the trapezoid? c. If s= 7, find the perimeter of the triangle.

Example 1 a)What is the perimeter of the triangle?

Example 1 b) The perimeter of a trapezoid is 7cm shorter than the perimeter of the triangle in part A. Find the perimeter of the trapezoid?

Example 1 c. If s= 7, find the perimeter of the triangle.

Example 2 Reid is y years old. Kayla is 6 years older than Reid and Isaac is 4 years younger than Reid. Find Kayla’s age. Find Isaac’s age. If y=12, find the sum of Reid and Isaac’s age.

Example 3 A pickup truck uses 1 gallon of gas for every 14 miles traveled. How far can it travel on 3p miles of gas? How many gallons of gas have been used after the pickup truck has traveled v miles? Evaluate the expression when v = 56.

Example 4 There were 3 questions on a math test. Shannyn earned m points for the first question and twice the number of points for the second question. How many points did she earn for the first two questions? If she received a total of 25 points on the test, how many points did she earn for the third question? If m = 5, find the points she earned for each question.