Answer:
A. 
Step-by-step explanation:
Answer:
answer is x=3 and y=10
Step-by-step explanation:
Forgot to isolate y and x and simplify
You can write the combination formula which is in the picture. Now if you can't guess what the varibles mean I'll tell you. N is the amount of digits you're allowed to use, and k is the amount of spots allowed in a number. Plus if the factorial sign or ! isn't part of your common knowledge, it means to multiply all below it stopping at 1. Finally if you comput your information into the formula you find out that there's 24 combinations. I hope this answers your question.
the answer is d. 12 cuz a cube is the same length in each side so the width is 6 and so is the length so 6×6 =36 so that's the area of the square and 6 ×12=72 divided by 2 (since it's a triangle) is 36 so the value of x is 12
C is the answer to you're question. :)