Page 475 - Algebra 1

13.
(57)
14.
(60)
Multi-Step Balls are printed in a pattern. Every 18th ball has stripes, every 15th ball has polka dots, and every 30th ball has stars.
a. How many balls are printed before there is a ball that has stripes, polka dots,
and stars?
b. How many balls have been printed at that point that have only two of the designs?
Building Jason is building a square deck around his home. His home is also in the shape of a square. He wants the deck to be 9 feet wide around the outer edge of his house. The house has a total side length of 8x. Write a special product and simplify to find the area of the house including the deck.
Golden Rectangle The length of a golden rectangle is equal to x + x√5 . If x = √5 , (61)what is the length of the golden rectangle?
15.
16. Multi-Step The data below show the number of customers served each day for
(62) a month at a diner.
80, 86, 105, 109, 127, 148, 137, 148, 141, 140, 135, 146, 90, 95, 101, 83,
114, 148, 127, 86, 85, 91, 141, 136, 82, 148, 127, 149, 80, 86 a. Create a stem-and-leaf plot of the data.
b. Analyze Describe the distribution of the data. What conclusions can be drawn from this?
17. Solve the following system using the elimination method. (63)
-8x - 5y = -52 4x + 3y = 28
9 feet
18. Decibel Levels The relationship between the intensity of sound (W/m2) and the
(64) distance from the source of the sound is represented by the equation I = _k . If you
d2
sit only 1 meter away from the stage at a rock concert, the intensity of sound is
about 0.1 W/m2. If Vanessa does not want the sound intensity to be any more than 0.0001 W/m2, how close to the stage can she sit?
*19. Coordinate Geometry Prove that ABCD is a rectangle. (65)
20. Multiple Choice Which one of the following systems has only one common (67) solution?
A y=21x+6 B 5x-2y=0 C -y=13x-6 D x-7y=14
y = -7x _5 x - y = 0 -2y = 26x + 9 _1 x - _7 y = _7 2 442
460 Saxon Algebra 1
8x
B
y
4
A
2
x
O
-2
2
2424
C
-2
D
-4