Hello!
The equation representing the statement is the third one, x=4(x-15). In fact, Juan’s age is x, his age 15 years ago is (x-15) and it is said that his age now is 4 times his age 15 years ago, so x=4(x-15).
If my answer is not clear enough or you’d like further explanation please let me know. Also, English is not my first language, so I’m sorry for any mistakes.
Answer:
Step-by-step explanation:
78,456 + 1.5 * 78,456
78,456 + 117684
196,140 people
Step-by-step explanation:
![\dfrac{\sqrt3}{\sqrt8}=\dfrac{\sqrt3\cdot\sqrt2}{\sqrt8\cdot\sqrt2}=\dfrac{\sqrt{3\cdot2}}{\sqrt{8\cdot2}}=\dfrac{\sqrt6}{\sqrt{16}}=\dfrac{\sqrt6}{4}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Csqrt3%7D%7B%5Csqrt8%7D%3D%5Cdfrac%7B%5Csqrt3%5Ccdot%5Csqrt2%7D%7B%5Csqrt8%5Ccdot%5Csqrt2%7D%3D%5Cdfrac%7B%5Csqrt%7B3%5Ccdot2%7D%7D%7B%5Csqrt%7B8%5Ccdot2%7D%7D%3D%5Cdfrac%7B%5Csqrt6%7D%7B%5Csqrt%7B16%7D%7D%3D%5Cdfrac%7B%5Csqrt6%7D%7B4%7D)
<h3>Used:</h3>
![\sqrt{ab}=\sqrt{a}\cdot\sqrt{b}\ \text{for}\ a\geq0\ \wedge\ b\geq0\\\\\sqrt{a}=b\iff b^2=a\ \text{for}\ a\geq0\ \wedge\ b\geq0\\\\\sqrt{16}=4\ \text{because}\ 4^2=16](https://tex.z-dn.net/?f=%5Csqrt%7Bab%7D%3D%5Csqrt%7Ba%7D%5Ccdot%5Csqrt%7Bb%7D%5C%20%5Ctext%7Bfor%7D%5C%20a%5Cgeq0%5C%20%5Cwedge%5C%20b%5Cgeq0%5C%5C%5C%5C%5Csqrt%7Ba%7D%3Db%5Ciff%20b%5E2%3Da%5C%20%5Ctext%7Bfor%7D%5C%20a%5Cgeq0%5C%20%5Cwedge%5C%20b%5Cgeq0%5C%5C%5C%5C%5Csqrt%7B16%7D%3D4%5C%20%5Ctext%7Bbecause%7D%5C%204%5E2%3D16)
Answer:
negative 8
Step-by-step explanation: