Suppose angles 1 and 2 are supplementary and ?1 = 
.Then ?2 = _____°.
A. 
B. 
C. 
D. 
E. 
Answer: A
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Round the whole number to its highest place value.219,018
A. 100,000 B. 210,000 C. 300,000 D. 200,000
Write a signed number for the statement.$343 loss
A. -343 B. 343
Solve the problem.Two phone companies compete for customers in a city. Company 1 retains 3/4 of its customers and loses 1/4 of its customers to Company 2. Company 2 retains 5/6 of its customers and loses 1/6 to Company 1. If we represent the fraction of the market held last year by 
, where a is the number the that Company 1 had last year and b is the number that Company 2 had last year, then the number that each company will have this year can be found by the following matrix equation. 
= 
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If Company 1 has A = 81,000 customers and Company 2 has B = 153,000 customers this year, then how many customers did Company 2 have last year?
A. 162,000 customers
B. 72,000 customers
C. 168,000 customers
D. 76,000 customers
Find the inverse. Determine whether the inverse represents a function.{(6, -10), (-4, -9), (-6, -8), (-8, -7)}
A. {(-10, 6), (-9, -4), (-8, -6), (-7, -8)}; a function B. {(-9, -10), (-7, -6), (6, -6), (-9, -8)}; a function C. {(-10, 6), (-9, -4), (-8, -6), (-7, -8)}; not a function D. {(-9, -10), (-10, -6), (6, -4), (-9, -8)}; not a function