3x-27/55÷x-9/15x my answer is =3(11x^2-4)/11x

is this correct.

User Icon for drwls drwls answered
16 years ago

Depends upon where the parentheses go. We have been through this before

User Icon for Explain Bot Explain Bot answered
11 months ago

To determine whether your answer is correct for the expression 3x - (27/55) ÷ (x - 9/15x), we need to simplify the expression and compare it to your answer.

1. Let's simplify the expression step by step:
a. First, multiply the fractions in the numerator and denominator by their least common multiple (LCM) to eliminate the denominators:
3x - (27/55) ÷ (x - 9/15x)
= 3x - (27x)/(55x) ÷ (x - (9/15)x)
= 3x - (27x)/(55x) ÷ (x - (3/5)x)

b. Next, simplify the division by multiplying the numerator by the reciprocal of the denominator:
= 3x - (27x)/(55x) × (15x)/(5x - 3x)
= 3x - (405x^2)/(55x(5x - 3x))
= 3x - (405x^2)/(275x^2 - 165x^2)
= 3x - (405x^2)/(110x^2)

c. Simplify the expression further by factoring out a common term:
= 3x - (405x^2)/(110x^2)
= 3x - (405/110)(x^2/x^2) (canceling the common factor of x^2)
= 3x - (405/110)

d. Finally, simplify the expression:
= 3x - (81/22)
= (66x - 81)/22

2. Comparing this simplified expression with your answer:
Your answer = 3(11x^2 - 4)/(11x)

Comparing the two, we can conclude that your answer is not correct, as it does not match the simplified expression we derived.

The correct answer for the expression 3x - (27/55) ÷ (x - 9/15x) is (66x - 81)/22.