The difference of two numbers is 8. When twice the first number is added to three times the second number, the result is 51. what are the two numbers? A.
12 and 4

B.
15 and 7

C.
20 and 12

D. 23 and 15

How do you find the circumfrance of a circle?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.