I think of a number multiply it by 3 and add 6 the result is 21 what is the number
1 answer:
You might be interested in
Answer:
36
Step-by-step explanation:
first, see the formula in the attached picture.
now, by applying that formula we get :
the coefficient of the x7y2 is :
9C7 = 36 (you can either use a calculator or just the algebraic formula)
