Which algebraic expression is equivalent to the expression below?

10(4x + 3) - 9x

a. 31x + 30
b. 31x - 3
c. 40x + 21
d. 49x + 30

I feel the answer is B. but I'm not sure. If someone could type out the equation, that'd be great

distributing the 10 ... 40x + 30 - 9x

To find the equivalent algebraic expression, we can simplify the given expression step by step.

Start with the original expression:

10(4x + 3) - 9x

First, distribute the 10 to both terms inside the parentheses:

40x + 30 - 9x

Next, combine like terms by adding or subtracting the terms with the same variable (in this case, x):

(40x - 9x) + 30

Combine the x terms:

31x + 30

So, the equivalent algebraic expression is 31x + 30.

Therefore, the correct answer is a. 31x + 30.