Determine whether the relation is a function. Give the domain and range.{(10, 8), (-9, -9), (4, 2), (-1, -9), (-9, 8)}
A. not a function; domain: {-9, -1, 4, 10}; range: {-9, 2, 8}
B. function; domain: {-9, 2, 8}; range: {-9, -1, 4, 10}
Answer: A
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Solve the problem.Use the formula N = Iekt, where N is the number of items at time t, I is the initial amount, and k is a growth constant equal to the percent of growth (expressed in decimal form) per unit of time. How long will it take for the population of a certain country to double if its annual growth rate is 6.9%? Round to the nearest year.
A. 1 yr B. 4 yr C. 29 yr D. 10 yr
Divide.
A. 5 R6 B. 6 C. 7 D. 5 R5
Use the substitution method to solve the system of linear equations. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.a + 3b = 13a = -9b + 3
A. (3, 1) B. {(a, b) | a + 3b = 1} C. {(a, b) | a = 3b + 1} D. No solution
Find the values of the variables in the equation.
+ 
= 
A. x = 1, y = 10, a = 
, z = 
, m = 0
B. x = 1, y = -10, a = 
, z = 
, m = 0
C. x = 1, y = 10, a = 7, z = 7, m = 0
D. x = 2, y = 10, a = 
, z = 
, m = 0