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2 years ago

7

Tap A can fill a tank in 3 hours. Tap B takes 8 hours to fill the same tank.What fraction of the tank can be filled by both taps

in 2hours?

1 answer:

Brilliant_brown [7]2 years ago

6 0

Answer:

11/12

Step-by-step explanation:

Tap A

1 tank / 3hr = 1/3 tank/1hr

Tap B

1 tank / 8 hr = 1/8 tank /1hr

Tap A + Tap B X 2hr

(1/3/hr +1/8/hr) * 2hr = 2/3 + 2/8 (the hr cancels out) = 8/12 + 3/12 = 11/12

LET ME KNOW IF THIS HELPED

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What inequality symbol belongs in the circle: -4 _ 5<br> 30 POINTS!

navik [9.2K]

Answer:

<

Step-by-step explanation:

Inequality symbols:

< less than

> greater than

= equal to

≤ less than or equal to

≥ greater than or equal to

In this case, it is known that -4 is less than 5, or:

-4 < 5.

~

7 0

3 years ago

Read 2 more answers

To find the extreme values of a function f(x,y) on a curve xequalsx(t), yequalsy(t), treat f as a function of the single vari

pychu [463]

Answer:

Absolute maximum is 2

Absolute minimum at -2

Step-by-step explanation:

The given parametric functions are:

$x=2\cos t,y=2\sin t$

By the chain rule:

$f'(t)=\frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

$\frac{df}{dt} =\frac{2 \cos t}{-2\sin t} =-\cot(t)$

At fixed points, $f'(t)=0$

$\implies -\cot (t)=0$

This gives $t=\frac{\pi}{2} ,\frac{3\pi}{2}$ on $0\le t\le 2\pi$

This implies that the extreme points are $(2\cos \frac{\pi}{2}, 2\sin \frac{\pi}{2})=(0,2)$ and $(2\cos \frac{3\pi}{2}, 2\sin \frac{3\pi}{2})=(0,-2)$

By eliminating the parameter, we have $x^2+y^2=4$

This is a circle with radius 2, centered at the origin.

Hence (0,2) is an absolute maximum ,at $t=\frac{\pi}{2}$ and (0,-2) is an absolute minimum at $t=\frac{3\pi}{2}$

7 0

3 years ago

I need help please .

levacccp [35]

Answer:

Step-by-step explanation:

You know that anything to the zeroeth power is 1, so the equation is now

-7 * 1, or -7.

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3 years ago

Explain your answer

N76 [4]

x is equal to - 2/3 after collecting like terms

5 0

3 years ago

Plz can you answer this Q quickly.?

stealth61 [152]

y=5/6+3

I am not positive on this answer I am sorry if it is wrong

5 0

4 years ago