L don’t know to you need to (X)
Answer:
![\large \boxed{\sf \bf \ \ a^2+b^2=20 \ \ }](https://tex.z-dn.net/?f=%5Clarge%20%5Cboxed%7B%5Csf%20%5Cbf%20%5C%20%20%5C%20a%5E2%2Bb%5E2%3D20%20%5C%20%5C%20%7D)
Step-by-step explanation:
Hello, please consider the following.
![a^b=b^a\\\\\text{ We can replace a by 2b.}\\\\(2b)^b=2^b\cdot b^b=b^{2a}=b^2\cdot b^b\\\\\text{ Let's assume that b is different from 0 and we can divide by }b^b \\ \\ \text{ both sides of the equation, and it come.}\\\\2^b=b^2\\\\\text{ We find b = 2 and then a = 4, So}\\\\a^2+b^2=4^2+2^2=16+4=20](https://tex.z-dn.net/?f=a%5Eb%3Db%5Ea%5C%5C%5C%5C%5Ctext%7B%20We%20can%20replace%20a%20by%202b.%7D%5C%5C%5C%5C%282b%29%5Eb%3D2%5Eb%5Ccdot%20b%5Eb%3Db%5E%7B2a%7D%3Db%5E2%5Ccdot%20b%5Eb%5C%5C%5C%5C%5Ctext%7B%20Let%27s%20assume%20that%20b%20is%20different%20from%200%20and%20we%20can%20divide%20by%20%7Db%5Eb%20%5C%5C%20%5C%5C%20%5Ctext%7B%20both%20sides%20of%20the%20equation%2C%20and%20it%20come.%7D%5C%5C%5C%5C2%5Eb%3Db%5E2%5C%5C%5C%5C%5Ctext%7B%20We%20find%20b%20%3D%202%20and%20then%20a%20%3D%204%2C%20So%7D%5C%5C%5C%5Ca%5E2%2Bb%5E2%3D4%5E2%2B2%5E2%3D16%2B4%3D20)
Hope this helps.
Do not hesitate if you need further explanation.
Thank you
Answer:
4545+y+A
Step-by-step explanation:
It cant be solved it can only be simplified down to 4545+y+A
Answer:
The answer is 2. hope it helps!
Step-by-step explanation:
Given :
A 18-mile taxi ride takes 21 minutes and costs $12.60.
To Find :
The cost of a 39- mile taxi ride. What unit price do you need.
Solution :
Unit price per mile :
![p=\dfrac{12.60}{18}\\\\p = \$0.7\ /mile](https://tex.z-dn.net/?f=p%3D%5Cdfrac%7B12.60%7D%7B18%7D%5C%5C%5C%5Cp%20%3D%20%5C%240.7%5C%20%2Fmile)
Cost of 39 mile taxi ride :
![C = 39\times p\\\\C=39\times 0.7\\\\C=\$27.3](https://tex.z-dn.net/?f=C%20%3D%2039%5Ctimes%20p%5C%5C%5C%5CC%3D39%5Ctimes%200.7%5C%5C%5C%5CC%3D%5C%2427.3)
Therefore, unit price is $27.3 and unit price is $0.7 / mile .
Hence, this is the required solution.