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
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You can learn more about solving equations in brainly.com/question/7153188
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Answer:
Step-by-step explanation:
What is the average speed of a biker if she biked 4 1/4 of a mile in 25 minutes?
-----------------
rate = distance/time
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rate = (17/4)/(25/60) = (17/4)(60/25) = (17*3/5) = 51/5 = 10.2 mph
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3, if you do the y^2-y^1/x^2-x^1 you will get 3/1 which will be simplified to 3.
Distributive property is basically expanding brackets.
So if you take 3(x + 4) = 36 and remove the brackets (so multiplying out the 3), you get:
3x + 12 = 36
And from there you simplify :)
3x + 12 = 36
3x = 24
x = 8
Distributive property was used to multiply the 3 through the brackets, thus making the equation easier to solve I guess
I honestly need help with that question 2