Simplify the expression.
+ sec x cos x
A. 1
B. sec2 x
C. tan2 x
D. csc2 x
Answer: B
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Solve the problem.Dave bought 15 packets of cookies for $31.80. Each packet of cookies contains 12 cookies. Find the cost of each cookie to the nearest tenth of a cent.
A. 17.7¢ B. 2.1¢ C. 18.8¢ D. 0.2¢
Tell if the square root is rational, irrational, or not a real number. If the square root is rational, find the exact value; if the square root is irrational, write the approximative value rounded to 2 decimal places.
A. not a real number B. irrational, 7.55 C. irrational, -7.55 D. rational, -57
Find the commission earned or the rate of commission. Round money answers to the nearest cent if necessary.Sales: $360 Commission: $21.60
A. 0.6% B. 8% C. 7% D. 6%
Determine whether the lines are parallel, perpendicular, or neither.-4x + 5y = 35x + 4y = -5
A. parallel B. neither C. perpendicular