Find the amplitude, period and mid-line. Also, find the maximum and minimum.

y = 2cos (2? t ) + 3 4


Amplitude: 2; period: 1; mid-line: y = 3 ; maximum: 5; minimum: 1

Mathematics

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Find the area.Find the area of a rectangle measuring 5 mi by 5 mi.

A. 22 mi2
B. 30 mi2
C. 25 mi2
D. 11 mi2

Mathematics

Write the equation of the line with the given slope and y-intercept.slope -9;y-intercept (0, 2)

A. y = -9x - 2 B. y = 2x - 9 C. y = -9x + 2 D. y = 9x + 2

Mathematics

Write the system as a vector equation or matrix equation as indicated.Write the following system as a matrix equation involving the product of a matrix and a vector on the left side and a vector on the right side.  2x1  + x2 - 6x3  = -66x1 - 4x2= 2

A.   = 
B.   = 
C.   = 
D.    = 

Mathematics

Decide if the answer is reasonable or unreasonable by rounding the numbers and estimating the answer. If the answer is not reasonable, find the correct answer.800.6 ÷ 19.7 = 40.64

A. Unreasonable, should be 406.4 B. Unreasonable, should be 0.4064 C. Unreasonable, should be 4.064 D. Reasonable

Mathematics