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If you read CPhill's solution to the previous problem, it will make it easier to understand.

Again, factor the numerator and the denominator! This a key factor for solving these types of problems!

For the numerator, we have $x^2+18x+81$, and that changes into $\left(x+9\right)^2$ after factoring.

Now, for the denominator, we have $\:x^2-81$, and that changes into $\left(x+9\right)\left(x-9\right)$ after factoring.

So, we have $\frac{\left(x+9\right)^2}{\left(x+9\right)\left(x-9\right)}$ and that yields our final answer as $\boxed{\frac{x+9}{x-9}}$.

Hint: Right triangles, hypotenuse=5..Does that take you somwhere? You can use the Pythogorean Triplets to rememeber.

I don't know if this is a good way to do this, but...

First, you can factor the numerator, which is $15x^2-8x-7$, to $\left(x-1\right)\left(15x+7\right)$.

We can do the same thing with the denominator $\:x^2-2x+1$, to $\left(x-1\right)^2.$

Now, we have $\frac{\left(x-1\right)\left(15x+7\right)}{\left(x-1\right)^2}$. And, we can cancel $x-1$, since that is our common factor. Thus, we are left with $\boxed{\frac{15x+7}{x-1}}$.

If you need more explanation on the factoring, just tell me. Also, I think synthetic division works.

Plugging the values in, we attain 4000*0.035*2=$280, (B). 

1. $1 equals 4 quarters or 10 dimes. So, we have the conversion factor of 10/4. Thus, 10/4*354=885 dimes.

2. 1 dollar equals 4 quarters, 52 quarters equals 52/4=13 dollars.

3. $1 equals 4 quarters or 20 nickels. Therfore, a conversion factor is 20/4=5. Thus, 35*5=175 nickels.

4. 1 quarter equals 25 pennies, so 75 quarters equal 1875 pennies. 

Let g be 100%.

Since, there is sales tax, which is 7%, we have: 100%+7%=107%

So, 107/100?

IDK, if this is correct!?

Thank you, Rom and CPhill!

Yep! Mean: 230+25+115+62/4=432/4=108 calories, which is (B).

Well, from 725-759 is considered good, (C).

Perimeter: 2l+2w

Area: lw

Perimeter: 2(30)+2(85)=60+170=230 ft

Area: lw=30*85=2550 ft^2