Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
C. x = 9; y = 2
D. x = 2; y = 
Answer: A
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Find the requested probability.A box contains the eleven letters, MISSISSIPPI. Four letters are drawn one by one with replacement and recorded in order. What is the probability that the outcome is SIPS?
A. 
B. 
C. 
D. 
Solve the equation.m(5m - 24) = -16
A. 
B. 
C. 
D. 
Find the general term of the arithmetic sequence then find the indicated term of the sequence. Assume that the domain of the sequence is all natural numbers.Find an and a18.
A. an = n + 4; a18 = 23 B. an = n + 3; a18 = 21 C. an = n - 4; a18 = 14 D. an = n - 3; a18 = 15
Solve the problem.A person puts $30 into a bank account on January 1, $40 on February 1, $50 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $840 B. $1080 C. $2040 D. $1020