Write an augmented matrix for the system of equations.9x + 5y = 49 2y = -2
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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The graph of a trigonometric function of the form y = A sin (Bx) or y = A cos (Bx) for B > 0 is given. Determine the equation of the function represented by the graph.
A. y = 3 sin 
x
B. y = 3 sin 4x
C. y = 4 sin 3x
D. y = 4 sin 
x
Mathematics
Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominators where necessary.sec ? = 10 
Find cos ?.
A. - 
B. 
C. 
D. - 
Mathematics
Simplify.8 ? 6 - 4 ? 9
A. 396 B. 144 C. 1728 D. 12
Mathematics
Write standard notation for the number in the sentence.A certain exotic sportscar costs three hundred twelve thousand, 
ninety-eight dollars.
A. 312,998 B. 3,209,980 C. 31,298 D. 312,998,000
Mathematics