Answer:
C
Step-by-step explanation:
Becuase it is the number of caleders purchesed times how many calenders
The triangle spilts into two 45-45-90 triangle. Because of that, the short leg and long leg with be the same length. It gives the hypotenuse, 10. Divided 10 by √2 which is 5 √2. The length of CD is 5 √2
3*x+3*12
3x+36
You just need to do the multiplication separately !
It's 21.4 square centimetres
