Write the following using algebraic notation.Six times a number
A. 6 + x
B. 6 - x
C. 
D. 6x
Answer: D
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Find the expected value of the random variable.The random variable X is the number of siblings of a student selected at random from a particular secondary school. Its probability distribution is given in the table.
A. 1.479 B. 2.5 C. 1.771 D. 1.375
Solve the problem. Round your answer to the nearest tenth, if necessary.Working together, Rick and Juanita can complete a job in 6 hr. It would take Rick 9 hr longer than Juanita to do the job alone. How long would it take Juanita alone?
A. 9 hr B. 3 hr C. 15 hr D. 6 hr
Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
A. 
B. 72y(y + 6)
C. 
D. 
Solve. Round to the nearest hundredth when necessary.A weather forecaster has predicted a high temperature of 34° C for tomorrow. Find this temperature in degrees Fahrenheit.
A. 50.89° F B. 29.2° F C. 93.2° F D. 118.8° F