Simplify: ( 1/5 - 1/10) × 3² - 4/5 a. 1/10 b.9/10 c.11/10 d.21/10

A. 1/10

Step-by-step explanation:

Step 1: Parenthesis

1/10(3²) - 4/5

Step 2: Exponents

1/10(9) - 4/5

Step 3: Multiply

9/10 - 4/5

Step 4: Conversion

9/10 - 8/10

Step 5: Subtract

1/10

Step-by-step explanation:

1) write down the equation:

(1/5 - 1/10)*3^2 - 4/5

2) common denominators:

(2/10 - 1/10)*9 - 8/10

3) combine the fractions with like denominators:

(1/10)*9 - 8/10

4) multiply out the parenthesis:

9/10 - 8/10

5) combine the fractions with like denominators:

1/10

The answer is 1/10, which is A

the answer is a if my teacher taught me correct