perimeter: 16
multiply it by 4 (since it's a square)
area: 80
it's a square so all you need to do is multiply it by itself
4 x
16 x 5 (squared them)
80
Solve Please- 2(2x+3)=30
2 answers:
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Answer:
5
Step-by-step explanation:
There are 2 ways to look at this. I will explain both.
First we have the 3-4-5 triangle method, stating that any triangle with sides 3 and 4 will have the last side as 5.
Now, for the more complex way of doing this, we can use the Pythagorean theorem to solve this problem.
Pythagorean theorem:
We can use 4 for a and 3 for b
You will now have
Then take √25, or 5.
The solution is x = 6
Step-by-step explanation:
Let us revise some rules of the exponents
- If
, then n = m
∵
∵ 9 = 3 × 3
∴ 9 = 3²
- Substitute 9 by 3² in the equation above
∴
- Use the second rule above for the left hand side
∵
∴
∴
- By using the first rule above
∴ 2x + 30 = 7x
- Subtract 2x from both sides
∴ 30 = 5x
- Divide both sides by 5
∴ 6 = x
The solution is x = 6
Learn more:
You can learn more about solving equations in brainly.com/question/7153188
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