3 weeks
Step-by-step explanation:
To find the number of weeks, we have to equate the amount already saved and planned to save by both each week.
So we can write the expression as,
Let w be the number of weeks.
25 + 5w =16 + 8w
Grouping the terms as,
25 - 16 = 8w - 5w
9 = 3w
Dividing both sides by 3, we will get,
3w/3 = 9/3
w = 3
So number of weeks = 3
Answer:
629 510$
Step-by-step explanation:
$899300 - (30% of $899300)
cuz its two years away from 2010 so it will have gone up 30 % so to rewind time, just go back 30%
PrimeAnswer:
Step-by-step explanation:
Using logarithms property of log(x)+log(y)=log(xy)
so here, you can sum the equation to;
![log((x+6)*(x-6))=2](https://tex.z-dn.net/?f=log%28%28x%2B6%29%2A%28x-6%29%29%3D2)
so you can simply say that;
![log_{8}((x+6)( x-6))=2](https://tex.z-dn.net/?f=%20log_%7B8%7D%28%28x%2B6%29%28%20x-6%29%29%3D2%20)
and by multiplying (x+6)*(x-6)
![log_{8}(x^2-36)=2](https://tex.z-dn.net/?f=log_%7B8%7D%28x%5E2-36%29%3D2)
and as you know also that;
![a^{b}=c](https://tex.z-dn.net/?f=%20a%5E%7Bb%7D%3Dc%20)
is same as
![log _{a}c=b](https://tex.z-dn.net/?f=log%20_%7Ba%7Dc%3Db%20)
so you can simply state it as;
![8^2=x^2-36 64=x^2-36 64+36=x^2 x^2=100 x=10](https://tex.z-dn.net/?f=8%5E2%3Dx%5E2-36%0A64%3Dx%5E2-36%0A64%2B36%3Dx%5E2%0Ax%5E2%3D100%0Ax%3D10)
And you can check your work by substituting with 10 instead of x in the original function.
Hope this helps!