Solve the problem.If (5, 3) is the endpoint of a line segment, and (1, 1) is its midpoint, find the other endpoint.
A. (13, 7)
B. (1, -5)
C. (-3, 5)
D. (-3, -1)
Answer: D
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Give a geometric description of the set of points whose coordinates satisfy the given conditions.x2 + y2 + z2 = 81, z = -2
A. All points within the sphere x2 + y2 + z2 = 81 and above the plane z = -2 B. All points on the sphere x2 + y2 + z2 = 81 and above the plane z = -2 C. The sphere x2 + y2 + z2 = 4 D. The circle x2 + y2 = 77 in the plane z = -2
Decide if the statement is true or false.cos ? increases in value as ? goes from 0° to 90°.
A. True B. False
Solve the problem.Ellen is knitting a scarf with one 5-inch blue stripe, one 5-inch green stripe, and one 
white stripe. How wide is the scarf?
A. 3
in.
B. 
in.
C. 12
in.
D. 
in.
Simplify the expression and solve the equation.One of the following is an expression to be simplified by algebraic operations, and the other is an equation to be solved. Identify each, and then simplify the one that is an expression and solve the one that is an equation.(a) 
+ 
= 
(b) 
+ 
style="vertical-align: -17.0px;" /> - 
A. (a) Expression. The simplified form of the expression is: 
(b) Equation. The solution to the equation is : 
x - 
B. (a) Equation. The solution to the equation is: 14
(b) Expression. The simplified form of the expression is: 
x - 
C. (a) Equation. The solution to the equation is: 
(b) Expression. The simplified form of the expression is: 
x - 
D. (a) Equation. The solution to the equation is: 
(b) Expression. The simplified form of the expression is: 
x - 