Simplifying 4m + 9 + 5m + -12 = 42 Reorder the terms: 9 + -12 + 4m + 5m = 42 Combine like terms: 9 + -12 = -3 -3 + 4m + 5m = 42 Combine like terms: 4m + 5m = 9m -3 + 9m = 42 Solving -3 + 9m = 42 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 9m = 42 + 3 Combine like terms: -3 + 3 = 0 0 + 9m = 42 + 3 9m = 42 + 3 Combine like terms: 42 + 3 = 45 9m = 45 Divide each side by '9'. m = 5
Answer:
Yes, with a condition.
Explanation:
Renewable energy sources and have always been available on the planet, but until recently, humans have not had the technology necessary to harness them. Since solar and wind energy are limitless, it clearly makes sense to invest the necessary amounts of money to build one-time infrastructure capable of powering all human activity without depleting natural resources.
The condition that is a prerequisite already being fulfilled is that technology be developed to make alternative energy solutions <em>economically viable and profitable </em>enough to be able to compete with traditional non-renewable sources.
Challenges for growing crops are you don't know if it will be successful, you have to have enough water, the dirt has to be fertile, and the weather may affect how the plant grows.
