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koban [17]
3 years ago
15

John swims 5/12 of a mile in 3/8 of an hour what distance in miles does John swim in an hour

Mathematics
1 answer:
Setler79 [48]3 years ago
4 0

Answer:

1.1 mph

Step-by-step explanation:

Step one:

John swims a distance of  5/12 miles

time taken = 3/8 of an hour

Required

The speed with which John swims

Step two:

speed= distance/time

substituting we have

speed= 5/12/3/8

multiply the numerator by the inverse of the denominator

speed= 5/12*8/3

speed= 40/36

speed= 1.1 mph

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3V3<br> х<br> 60°<br> Find the values of x and y. Write your answers in simplest form.<br> X=<br> y=
Alex787 [66]

Answer:

X=3

y=6

Step-by-step explanation:

tan60=\sqrt{3}=\frac{3\sqrt{3} }{x}  \\\\x=3

-----------

sin60=\frac{\sqrt{3} }{2} =\frac{3\sqrt{3} }{y} \\\\y=6

hope it helps...

have a great day!!

6 0
3 years ago
Describe the graph of the function f(x) = x3 − 11x2 + 36x − 36. Include the y-intercept, x-intercepts, and the end behavior.
jenyasd209 [6]
The function is f(x)=x^3-11x^2+36x-36.

To find the x-intercepts, we need to factorize the function. A very good idea is to first try the factors of 36:

f(1)=1-11+36-36, not 0

f(2)=8-44+72-36=-36+72-36=0. Here we have our first root (2).

Now we cad divide f(x) by (x-2) which will give us a quadratic expression, which we can factorize easily (if the discriminant is non negative).

We can also try some other factors of 36. Indeed we can check that 

f(3)=27-99+108-36=135-135=0, 
and
f(6)=216-396+216-36=0.

Thus, f(x)=(x-2)(x-3)(x-6). Note that if we expanded the right hand side expression, the constant term would be the product of the constants 2, 3, 6.

This is the reason why in the first place we looked at the factors of 36 for the possible zeros of f(x).


Thus, the x-intercepts are (2, 0), (3, 0), (6, 0), or 2, 3, 6. 

The y-intercept is f(0), which is -36.


Note that f(0)<f(2) because f(0)=-36 and f(2)=0. This means that at the left side, the graph is coming from - infinity. Similarly, 

we can check that f(10)=1000-1100+360-36=224> f(6). That is, to the right of our rightmost root, the graph is getting larger.

Thus, the end behaviors are: the graph goes to + infinity as x goes to + infinity, 

and it goes to minus infinity as x goes to - infinity.
7 0
3 years ago
HELP<br> PLEASE. <br> Simplify the expression.<br> x^2+2x-24/x^2-x-42
Sophie [7]

Answer:

\frac{x - 4}{x - 7}

Step-by-step explanation:

\frac{ {x}^{2} + 2x - 24 }{ {x}^{2} - x - 42 }  \\  \frac{(x + 6) (x - 4)}{(x - 7)(x + 6)} \:the \: term \: will \: be \: simplified (x + 6)  \\ and \: we \: will \: be \: left \: with \:  \frac{x - 4}{x - 7}

3 0
3 years ago
Read 2 more answers
20 points!!!!<br><br> in2. Round to the nearest whole<br> The area of the figure below is<br> number
andrew11 [14]

Answer:

=760

Step-by-step explanation:

Area: \pi  r^{2}

diameter= 44

radios= 22

area of full circle:

3.14(22)^2

= 1519.76

Area of half circle"

1519.76/2= 759.88

=760

4 0
3 years ago
GUYS PLEASE HELP:<br><br> Evaluate the function <br> f (x) = 2x+6 for: <br><br> f(-19) =
Mariulka [41]

Answer:

-32

Step-by-step explanation:

f(x) = 2x + 6

f(-19) = 2*(-19) + 6

        = -38 + 6

        = -32

3 0
3 years ago
Read 2 more answers
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