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3 years ago

10

A woman can bicycle 46 miles in the same time as it takes her to walk 14 miles. she can ride 8 mph faster than she can walk. how

fast can she walk

1 answer:

Inga [223]3 years ago

7 0

I actually don't know it's kinda of confusing I'm sorry I'm just tired I'll give you the answer when I get it.

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Find all points on the circle (x^2) + (y^2) = 676 where the slope is 5/12

borishaifa [10]

Implicit defferentation

remember that dy/dx y= dy/dx

so
take derivitive of both sides
$2x+2y \space\ \frac{dy}{dx}=0$
solve for $\frac{dy}{dx}$
minus 2x both sides
$2y \space\ \frac{dy}{dx}=-2x$
divide both sides by 2y
$\frac{dy}{dx}=\frac{-2x}{2y}$
$\frac{dy}{dx}=\frac{-x}{y}$

when is the slope equal to $\frac{5}{12}$
solve for $\frac{dy}{dx}=\frac{5}{12}$
$\frac{dy}{dx}=\frac{5}{12}$
$\frac{5}{12}=\frac{-x}{y}$
$5y=-12x$
$y=\frac{-12}{5}x$
find where the circle and this line intersects

substitute $\frac{-12}{5}x$ for y
$x^2+(\frac{-12}{5}x)^2=676$
$x^2+\frac{144}{25}x^2=676$
$\frac{25}{25}x^2+\frac{144}{25}x^2=676$
$\frac{169}{25}x^2=676$
times both sides by $\frac{25}{169}$
$x^2=100$
sqrt both sides, take positive and negative roots
x=+/-10

sub back

$y=\frac{-12}{5}x$
$y=(\frac{-12}{5})(10) \space\ or \space\ (\frac{-12}{5})(-10)$
$y=\frac{-120}{5} \space\ or \space\ \frac{120}{5}$
$y=-24 \space\ or \space\ 24$

the points are (10,-24) and (-10,24)

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3 years ago

Consider the equation below.

il63 [147K]

I think the answer is -3 i’m not sure

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Q6. Write these numbers in order of size.

ki77a [65]

Answer:

It should be <u>-5, 5 to the power of -1, 0.5, 5 to the power of 0</u> in least to greatest form.

Step-by-step explanation:

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3 years ago

What number is in the 100 place 123.456

soldier1979 [14.2K]

The hundreds place is 1
Tens is 2
Ones is 3
Tenths is 4
Hundredths is 5
Thousandths is 6

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Q # 3 evaluate the polynomial

Bad White [126]

Heres what you do: Replace X with -3 and Y with 2. Your equation will look like this: 6(-3)-2. Multiply 6 and -3 to get -18. Then subtract 2 from -18. Your answer is -20

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