Answer:
-3x² - 12x + 8
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Distributive Property
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify</em>
2x² - 4x + 6 - (5x² + 8x - 2)
<u>Step 2: Simplify</u>
- (Parenthesis) Distribute negative: 2x² - 4x + 6 - 5x² - 8x + 2
- Combine like terms: -3x² - 12x + 8
Answer:
B. 5.4
Step-by-step explanation:
3/5 = 6/10
6/10 = 0.6
9 x 0.6 = 5.4
Answer:
Step-by-step explanation:
There might be a shorter way of doing this and a better one as well, but here is how I did it.
Let the three numbers be
Solution
Note that these three numbers are consecutive and even.
Twice the smallest number is 2 * (2n - 2)
20 more than the second number is 2n + 20
Now equate them.
2(2n - 2) = 2n + 20 Remove the brackets.
4n - 4 = 2n + 20 Add 4 to both sides
4n - 4 + 4 = 2n + 20 + 4
4n = 2n + 24 Subtract 2n from both sides.
4n - 2n = 2n - 2n + 24
2n = 24
Now stop
Answers
- The middle number is 24
- The smallest number is 24 - 2 = 22
- The largest number is 24 + 2 = 26
Check
22*2 = 44
The middle number = 24 + 20 = 44
Answer:
I think it's A.
Step-by-step explanation:
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