Page 597 - Algebra 1

3 4 *24. Measurement Malik is adding 5 feet to the length of a screened-in porch. If the (87) porch is originally a square room with area x2 and the new area measures
50 square feet, what are the dimensions of the new porch?
*25. Geometry A rectangle has a length of 12x2 + 3y and a width of 6x2 + y.
(87) What is its area? What is the simplest way to express the area?
26. Multiple Choice What is the result of a complete factoring of 25x2 - 81?
(87) A 25(x+9)(x-9) B 5x·5x-81
C 52x2 - 92
D (5x+9)(5x-9)
*27. Generalize What is the method for multiplying and dividing exponents when working (88) with rational expressions?
__ *28. Multiple Choice Multiply y2 + 6y + 5 · y .
(88) _ y2 y + 1_ y+5 y+5
A y2
(y + 1)(y + 5)
B y
D y(y + 5)
30. Multi-Step The area of a square patio is represented by 81x2 - 36x + 4 square feet. (75) a. Factor the expression completely.
b. Why do you think this expression is called a perfect square?
__ C y2
*29. Murals Lucy paints murals. She_charges $10.00 per square foot. If she paints a 1
(88) mural that is c2 + 7c + 10 ft by c + 5 ft, how much does Lucy charge for painting the mural?
582 Saxon Algebra 1