The side lengths of quadrilateral CDER are as follows( 4 cm, DE 5cm
EF -- 8 cm, and CF 7 cm. The figure is
rotated 180° about the vertex C. What
are the side lengths of the resulting
image, Figure C'DEF?
I can’t get it??? Someone help please

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?