18. Use Pascal's triangle to find the coefficients of the expanded polynomial (a + b)^3. options:

A) 1 3 3 1
B) 1 2 1
C) 1 1
D) 1 4 6 4 1

Step-by-step explanation:

Hello, let's compute the first lines of the Pascal's triangle.

1

1 1

1 2 1

1 3 3 1

So for this question,

And then, the correct answer is A.

Thank you

11

step-by-step explanation:

32.50-7.50=25

225/25=11

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,