Page 249 - Algebra 1

*13. Graph 50x - 100y = 300 using the x- and y-intercepts. (35)
14. Geometry A square has side lengths of 3 centimeters. Another square has side (36) lengths of 6 centimeters.
a. What is the scale factor of the sides of the smaller square to the larger square?
b. What is the perimeter of each square?
c. What is the ratio of the perimeter of the smaller square to the perimeter of the
larger square?
d. What is the area of each square?
e. What is the ratio of the area of the smaller square to the area of the larger square?
*15. Error Analysis In the figures at right, ∠A and ∠F correspond. Two students
(36) are finding the measure of ∠F. Which student is correct? Explain 5
B
D
E
the error.
A 80°
4 F x°
Student A
5 = 80 __
4x 5x = 320 x = 64
m∠F = 64°
Student B
m∠A = m∠F 80° = m∠F
16. Architecture A room is 10 feet by 12 feet. If the scale of the blueprints to the room (36) is 1 inch to 2 feet, find the dimensions of the room on the blueprints.
Measurement What is the ratio of the area of the smaller circle to the area of the (36) larger circle?
18. Verify Verify that the sequence 4, 2_2 , 1_1 , 0, ... is an arithmetic sequence. (34) 33
19. A piece of fruit is chosen from a box, eaten, and then a second piece of fruit is (33) chosen. Identify these events as independent or dependent.
20. Predict An estimate of the number of tagged foxes to the total number of foxes (31) in a forest is 3 to 13. A forest warden noted 21 tagged foxes during a trip in the
forest. Write a proportion to indicate the total number of foxes that might be in the forest.
21. Multiple Choice In the rule for the nth term of arithmetic sequence (34) an = a1 + (n - 1)d, what does a1 represent?
A the number of terms B the first term
C the nth term D the common difference
*22. Physical Science The wavelengths of ultraviolet light can range from 10-9 meter to (32) 10-7 meter. Express the range of wavelengths using positive exponents.
C
3 4 *17.
2 3
234 Saxon Algebra 1