Answer:
50
Step-by-step explanation:
hope this helps! :)
The United States of America is a federal republic consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major (land areas owned or controlled by someone), and different minor islands.
Answer:
$200
Step-by-step explanation:
Here is the full question
You can upgrade lighting at your factory to LED bulbs that cost $6.95 each and last an average of 5 years. It costs $3 in labor to change a bulb. Over a 10-year period, about how much will it cost per year to install LED bulbs in 100 lamps and change the bulbs when they burn out?
in 10 years, the bulbs would be changed twice
Total cost incurred per bulb in 10 years = (6.95 + $3) x 2 = $19.90
Since there are 100 bulbs, total cost incurred would be - $19.90 x 100 = $1990
Cost per year = $1990 / (6.95 + $3) = $200
Answer:
x = 18/5
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
5x + 2 = 20
<u>Step 2: Solve for </u><em><u>x</u></em>
- Subtract 2 on both sides: 5x = 18
- Divide 5 on both sides: x = 18/5
<u>Step 3: Check</u>
<em>Plug in x into the original equation to verify it's a solution.</em>
- Substitute in <em>x</em>: 5(18/5) + 2 = 20
- Multiply: 18 + 2 = 20
- Add: 20 = 20
Here we see that 20 does indeed equal 20.
∴ x = 18/5 is a solution to the equation.
