Select all of the transformations that always maintain a shape's congruency. A) A reflection
B) Adilation
C) A reflection and then a dilation
D) A rotation then a translation
E) A translation then a reflection

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart