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3 years ago

What's the formula for #27?

Mathematics

2 answers:

podryga [215]3 years ago

7 0

V=LWH and L=W=30 and H=10

V=30*30*10

V=9000in^3

Andre45 [30]3 years ago

3 0

A(area)*D(depth) gives you how many cubic feet of potting soil you need. The correct answer btw is 300 cubic feet

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The sum of the areas of two circles is 80x square meters , find the length of the radius of each circle if one of them is twice

mestny [16]

One radius is 4m and other one is 8m

7 0

3 years ago

Please help me answer

Whitepunk [10]

Answer:

The answer is: C. 3my^4 - 3my^2x

Step-by-step explanation:

For the problem:

3my^2 (y^2x - x) =

Multiply each term by 3my^2:

3my^2 * y^2x - 3my^2 *x =

3my^4x - 3my^2x

8 0

3 years ago

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)

8 0

3 years ago

on our way to visit her parents Jennifer Drive 265 miles in 5 hours what is the average rate of speed in miles per hou

Setler79 [48]

The average speed would be 53 miles per hour, hope this helped, if you need me to explain then here is the way, so all you do is divide 265 by 5 and what I did to help make it faster was split 265 into 250 and 15 so 250 divided by 5 is 50 and 15 divided by 5 is 3 so 50 + 3 = 53!

6 0

4 years ago

Graph each equation or inequality <br><br> y = 3/4x-2

bagirrra123 [75]

The answer to your question is b

7 0

3 years ago