Determine whether the following is an equation or an expression.48a + 6 - 37a - 4
A. expression
B. equation
Answer: A
Mathematics
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Write the subset of real numbers in set-builder notation. (-4, 4]
A) {x -4 < x 4} B) {x -4 < x < 4} C) {x -4 x 4} D) {x -4 x < 4}
Mathematics
Find the length of the unknown side of the right triangle. In each case, a and b represent the lengths of the legs and c represents the length of the hypotenuse.
b = 9, c = 15; find a
A. 14 B. 15 C. 11 D. 12
Mathematics
Use a double-angle formula to rewrite the expression. ? 2 sin2 x - 1 ?
A. cos x B. cos 2x? C. -2 cos x? D. 2 cos 2x? E. - cos 2x?
Mathematics
Find the quotient and check.
A. 
B. 
C. 
D. 
E. 
Mathematics