Give a set of parametric equations that describes the curve. Be sure to specify the interval over which the parameter varies.The ray (half line) with initial point (-7, 9) that passes through the point (1, 4)
What will be an ideal response?
Answers will vary. Possible answer: x = -7 + 8t, y = 9 - 5t, t ? 0
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Solve the given differential equation.
+ 49y = cos 7x
A. y = c1 sin 7x + c2 cos 7x + 
x cos 7x
B. y = c1 sin 7x + c2 cos 7x - 
x sin 7x
C. y = c1 sin 7x + c2 cos 7x + 
x sin 7x
D. y = c1 sin 7x + c2 cos 7x + 
x sin 7x + 
x cos 7x
Simplify the expression.9x - (5 - 4x)
A. 5x - 5 B. 9x - 9 C. 13x - 5 D. 13x + 5
Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 - 2x + 4y - 10 = 0
A. (x + 1)2 + (y - 2)2 = 15
center (-1, 2), r = 
B. (x - 1)2 + (y + 2)2 = 15
center (1, -2), r = 
C. (x - 1)2 + (y + 2)2 = 15
center (-1, 2), r = 
D. (x - 1)2 + (y + 2)2 = 15
center (1, -2), r = 15
Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 20, percent = 60
A. whole = 3.3 B. whole = 33.3 C. whole = 16.7 D. whole = 300