I thought I knew the answer but I don’t Srry I need points
Answer:
![\frac{x}{y}=1.3](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7By%7D%3D1.3)
Step-by-step explanation:
<u>Informação recuperada:</u>
(UFRGS) Se 10x = 20y , atribuindo 0,3 para log 2 , então o valor de x/y é
1) Primeiro, passando o 10 para o 2º membro como base do logaritmo:
![10x=20y \Rightarrow x=log_{10}20y](https://tex.z-dn.net/?f=10x%3D20y%20%5CRightarrow%20x%3Dlog_%7B10%7D20y)
2) Aplicando a propriedade do produto de logaritmo:
![log(AB)= logA+logB](https://tex.z-dn.net/?f=log%28AB%29%3D%20logA%2BlogB)
![x=log_{10}20y \Rightarrow x=log(2+10)y\Rightarrow x=(0.3+1)y \Rightarrow x=1.3y](https://tex.z-dn.net/?f=x%3Dlog_%7B10%7D20y%20%5CRightarrow%20x%3Dlog%282%2B10%29y%5CRightarrow%20x%3D%280.3%2B1%29y%20%5CRightarrow%20x%3D1.3y)
3) Como quero o quociente divido ambos os lados por y
![\frac{x}{y}=\frac{1.3y}{y}\Rightarrow \frac{x}{y}=1.3](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7By%7D%3D%5Cfrac%7B1.3y%7D%7By%7D%5CRightarrow%20%5Cfrac%7Bx%7D%7By%7D%3D1.3)
Answer:
1. Her time in minutes is 720/s minutes
2. Given her time to be 20 minutes, her speed is 36 mph
Step-by-step explanation:
Mathematically,
Distance = speed * time
In this question, we want to calculate time;
So time = distance/speed
times = 12 miles/s mph = 12/s hours
Now we want our answer in minutes
Kindly recall that 60 minutes = 1 hour
So 12/s hours will be 12/s * 60 = 720/s minutes
2. Since she drives from home to the office in in 20 minutes, we want to calculate her speed in mph
From the time calculated above i.e 720/s
We can equate 20 = 720/s
20s = 720
s = 720/20
s = 36 mph
Answer:
239
Step-by-step explanation:
Write the equation. Fill in the given values, and solve for the unknown,
z = k√x
717 = k√9
k = 717/3 = 239
The constant of proportionality is 239.