Solve the equation for the interval [0, 2?).sin2x - cos2x = 0
A. x = 
B. x = 
, 
, 
, 
C. x = 
, 
D. x = 
, 
Answer: B
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Decide whether the following is an expression or an equation. If it is an expression, simplify it. If it is an equation, solve it.
= -1
A. Equation; 24
B. Expression; - 
C. Equation; -24
D. Expression; 
A geometric sequence is given. Find the common ratio and write out the first four terms.{un} = 
A. r = 
; u1 = 3, u2 = 
, u3 = 
, u4 = 
B. r = 3; u1 = 3, u2 = 
, u3 = 
, u4 = 
C. r = 3; u1 = 3, u2 = 
, u3 = 
, u4 = 
D. r = 
; u1 = 
, u2 = 
, u3 = 
, u4 = 
Solve the problem.Let x represent the number of gallons of gas sold at $2.30 per gallon, and let y represent the total cost of the gasoline (in dollars). Use an equation to find the cost of 13 gallons of gasoline.
A. $29.90 B. $10.70 C. $5.65 D. $15.30
Write the word name for the number.235,060
A. Twenty-three thousand, five hundred six B. Twenty-three thousand, five hundred sixty C. Two million, thirty-five thousand, sixty D. Two hundred thirty-five thousand, sixty