Page 449 - Algebra 1

*12. Multiple Choice What is the solution to 3z + 2 ≤ z - 4 + 2 + z?
(66) A z ≤ -4 B z ≤ 0 C z ≤ 3 D z ≤ 4
*13. Coordinate Geometry Find a line that is both a line of symmetry for the (65) figure and also a perpendicular bisector of two of the sides.
14. Multi-Step In a student poll about yearbook covers, every 12th student likes (57) blue, every 16th student likes red, and every 28th student likes white.
a. How many students are polled before one student likes red, white, and blue?
b. If 1200 students are polled, how many like red, white, and blue?
15. Solve the system of equations by substitution.
(59)
x = 10y - 2 2x - 18y = 8
*16. Velocity The tangential velocity of an object in circular motion can be found using
(61)
_Fr
the expression √m , where F is the centripetal force, r is the radius of the circle, and
m is the mass of the object. What is the tangential velocity of an object with a path radius of 2 m, a centripetal force of 60 kgm/s2, and a mass of 3 kg?
17. Multiple Choice Which system of equations has a solution of y = 5?
(63) A 2x+5y=16 2x + y = -4
C 2x + 5y = -4 -2x + y = -8
B 2x+5y=19 x - 5y = -13
D 2x + 5y = 11 x - 5y = -17
18. Justify Explain the steps that are used to solve this system of linear equations by (63) elimination.
2x + 6y = 4 3x - 7y = 6
*19. Coordinate Geometry What kind of quadrilateral is EFHG? Justify your answer. (65)
x
-2
y
H 2
4
-2
G
F
E
y
2
E
-2
2
4
F
-2
G
H
434 Saxon Algebra 1
-6
4
B
C
2
A
D
x
-4