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svp [43]
3 years ago
9

Beth can run 3 miles in 25.8 minutes. How long does it take her to run1 one mile you

Mathematics
1 answer:
kobusy [5.1K]3 years ago
3 0

Answer: it would be 8.6 I think If I’m  doing this right you would divide 25.8 and 3 and it comes out to 8.6





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The area of a rectangular city park is 25/54 square miles. The length of the park is 5/9 miles. What is the width of the park?
alexdok [17]
Hi

We know that Area= length * width right?

So this is what we do.

Total area/length

25/54 / 5/9

You get the width to be 5/6

CHECK:
5/6*5/9=25/54

Hope this helps :)


4 0
3 years ago
[SCREENSHOT INCLUDED] If f(x) = sqrt(2x+1) then f '(4) =
Sphinxa [80]

Using the definition,

f'(4) = \displaystyle \lim_{x\to4} \frac{f(x)-f(4)}{x-4}

The numerator in the difference quotient is

f(x) - f(4) = \sqrt{2x+1} - \sqrt{2\cdot4+1} = \sqrt{2x+1}-3

Multiply the numerator and denominator by the conjugate of this expression,

\displaystyle \frac{\sqrt{2x+1}-3}{x-4} \cdot \dfrac{\sqrt{2x+1}+3}{\sqrt{2x+1}+3}

The modified numerator reduces to a difference of squares,

\displaystyle \frac{\left(\sqrt{2x+1}\right)^2-3^2}{(x-4)\left(\sqrt{2x+1}+3\right)}

Simplify this to get

\displaystyle \frac{2x+1-9}{(x-4)\left(\sqrt{2x+1}+3\right)} = \frac{2(x-4)}{(x-4)\left(\sqrt{2x+1}+3\right)}

Since x is approaching 4, it never actually takes on the value of 4, so (x - 4)/(x - 4) reduces to 1. Then the limit is equivalent to

f'(4) = \displaystyle \lim_{x\to4} \frac{f(x)-f(4)}{x-4} = \lim_{x\to4}\frac2{\sqrt{2x+1}+3}

and the remaining limand is continuous at x = 4, so that

f'(4) = \dfrac2{\sqrt{2\cdot4+1}+3} = \dfrac26 = \boxed{\dfrac13}

6 0
2 years ago
Instructions:Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
larisa [96]
A knitter with 14 skeins of yarn can make 7 scarves

Explanation:
We can use a proportion to solve this

4 skeins of yarn
-----------------------
2 scarves

That is the information we know. What we want to do is find out how many scarves for 14 skeins of yarn, like this

4 14
-- = ---
2 ?

To get from 4 to 14, you multiply by 3.5. We must to the same thing to the bottom as well. So we multiply 2 by 3.5, which gives us 7

x3.5
4 14
-- = ---
2 7
x3.5

4 0
3 years ago
Read 2 more answers
Use the triangle below to write the given ratios. <br>sin(P) = <br>tan(T) = <br>cos(T) =​
-Dominant- [34]

sin(P) = side opposite angle p / hypotenuse = 5 / 13

tan(T) = side opposite angle T / side besides angle T = 12 / 5

cos(T) = side beside angle T / hypotenuse = 5 / 13

Hope that helps!

3 0
2 years ago
In order to join a yoga class, you pay a $100 annual fee plus an additional $5 for each class you go to. What is the average cos
babunello [35]

Answer:

200$

Step-by-step explanation:

5x20=100 plus 100 from annual

7 0
3 years ago
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