Answer:
m<C = 56°
m<D = 124°
Step-by-step explanation:
Of CDEF is a parallelogram then the sum of angle m<C and angle m<D must be equal to 180°
4x + 28 + 17x + 5 = 180 add like terms 
21x + 33 = 180 subtract 33 from both sides 
21x = 147 divide both sides by 21
x = 7 now to find the measure of each angle replace x with 7
 
        
             
        
        
        
Answer:
If you multiply the length and width it's already more than D and b so it's between 41 and 71 , I believe it's 71 though
 
        
             
        
        
        
ivied the total number of tennis balls buy the number of cans to see how many tennis balls are in 1 can
9 divided by 3 = 3
 there are 3 tennis balls per can
 fraction would be 3/1  ( meaning 3 balls to 1 can)
 
        
             
        
        
        
x should equal -2 and y should equal -3 to solve this i multiplied the first equation by 2 then got rid of the 4y and -4y then i added the 14x to the 9 equaling 23x and added the -40 to the -6 which became 23x=-46 i solved this getting -s for x, then i plugged that into the equations to get y which was -3
 
        
             
        
        
        
Answer:
The quadrilateral would be a rectangle.
explanation:
since opposite sides are equal, the diagonals are bound to equal as well, since the whole point of a diagonal is to go from one point to it's opposite corner.
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