Let w be the width of the deck. Then, using the total area, we get:
(9+2w)(18+2w)=400
4w²+54w-238=0
2w²+27w-119=0
(2w-7)(w+17)=0
w=-17 or 7/2
Using the positive value, we get a width of 3&1/2 ft. for the deck
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Answer: The puppy was
havier in October that it was in September.
Step-by-step explanation:
You need to make the conversion from mixed numbers to decimal numbers. To do it, divide the numerator of the fraction by the denominator add the result to whole part number:

The weight of the puppy in September was:

And its weight in October was:

Subtract its weight in September from its weight in October in order to find how much heavier the puppy was in October than it was in September:

Answer:

Step-by-step explanation:
Given





Required
Find the constant of variation
From the question, the variation is as follows



Convert variation to equation

Where k represents the constant of variation
Make k the subject of formula;
Multiply both sides by s * t


Divide both sides by p



Substitute the values of p, r, s and t in the above equation


Divide numerator and denominator by 6

Hence, the constant of variation is; 
Answer:
<u><em>y = -1/3x + 2</em></u>
Step-by-step explanation:
<em>I chose one of the points and then I plugged in the x of that coordinate and then I did the math and checked which answer choice made the equation true</em>