10 more than 2 times a number is equal to 2 times the number plus 50. what is the number

* show the work*

Find the value of the cosine for angle a

Abcd is reflected across the x- axis, then rotated 90 clockwise about the orgin, and finally reflected across the line y= x to form a’ b’ c’ .

C. using a standard deck of 52 cards, the probability of selecting a 4 of diamonds or a 4 of hearts is an example of a mutually exclusive event. true of false