Simplify the expression. Assume that all variables are non-negative.
A. 3y4
B. 3xy5
C. 3y5
D. 3xy4
Answer: C
Mathematics
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Find ? for 0° ? ? < 360°.csc ? = 1.441
A. 43.94°, 136.06° B. 43.94°, 316.06° C. 55.24°, 235.24° D. 46.06°, 313.94°
Mathematics
Evaluate the expression.20 + (-12) - 19 - (-12)
A. 39 B. 1 C. -23 D. 15
Mathematics
Write the fraction in simplest form. Assume that all variable factors in the denominator are not equal to zero.- 
A. -1
B. -1
C. - 
D. - 
Mathematics
Solve the problem.Assume it costs 25 cents to mail a letter weighing one ounce or less, and then 20 cents for each additional ounce or fraction of an ounce. Let L(x) be the cost of mailing a letter weighing x ounces. Graph y = L(x).
A.
B. 
C. 
D.
Mathematics