Decide whether the given set of numbers is a group under the given operation.Natural numbers; subtraction
A. Yes
B. No
Answer: B
Mathematics
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Find the equation of the line with the given properties. Express your answer in slope-intercept form.Parallel to 4x + y = 4 and through the point (2, -3)
A. y = - 4x - 5
B. y = 4x - 5
C. y = - 4x + 5
D. y = - 
x - 
Mathematics
Find the standard form of the equation of the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the problem.Find the area of a sector of a circle of radius 4 centimeters formed by a central angle of 
Round your answer to two decimal places.
A. 1.33 sq cm B. 4.19 sq cm C. 8.38 sq cm D. 1.05 sq cm
Mathematics
Identify all values for which the expression is undefined.
A. -7 B. None C. 7 D. 7, 5
Mathematics