Without graphing the function, determine its amplitude or period as requested.y = 
cos (- 
x)Find the amplitude.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve.3x + 1 = 4 (Round to the nearest thousandth.)
A. 2.262 B. 1.262 C. 0.262 D. 0.523
Mathematics
Find the value of the variable that satisfies the equation.-9x + 6 = 5 + 4x
A. x = - 13
B. x = - 
C. x = 
D. x = 13
Mathematics
Write the equation of the line whose graph is shown.
A. y = - x - 3 B. y = x - 3 C. y = - x + 3 D. y = x + 3
Mathematics
Find the following root if it exists.
A. 5 B. This root does not exist as a real number. C. 25 D. -5
Mathematics