All categories

3 years ago

Two hoses from two different taps are used to fill a fishpond. The first hose alone

Mathematics

1 answer:

Paraphin [41]3 years ago

4 0

Answer: 12 minutes

Step-by-step explanation:

Two rates for hoses A and B. FP is the Fish Pond.

A = 20 min/FP or (1/20)FP/min

B = 30 min/FP or (1/30)FP/min

The time in minutes, X, to fill one FP:

1FP = X*((1/20)FP/min) + X*((1/30)FP/min)

1FP = X*(1/20+1/30)FP/min

1FP = X*(2.5/30)FP/min

X = 12 minutes

You might be interested in

Lucian was hiking through a field directly toward his car, which was parked on a long, straight road perpendicular to his path,

saul85 [17]

So basically she has 16 miles when she walked

8 0

3 years ago

Four monsters decide to throw a party.A vampire,zombie,mummy and werewolf go shopping for food and drinks.The vampire buys 4 bag

otez555 [7]

Answer:They spend $39.89

Step-by-step explanation:

Vampire:4•3.99=15.96

Zombie:2•1.04=2.08

3•0.79=2.37,2•3.49=6.98

Mummy:5•2.50=12.50

The Werewolf doesn’t buy anything

15.96+2.08+2.37+6.98+12.50=$39.89

5 0

4 years ago

The ratio of boys to girls at a movie is 4:7. If there are 21 girls, how many boys are at the movie?

GaryK [48]

Answer:

12 boys

Step-by-step explanation:

7 x 3 = 21

4 x 3 = 12

12 boys

3 0

3 years ago

What are the approximate solutions of 4x2 + 3 = −12x to the nearest hundredth?

Gwar [14]

First
$4x^{2} + 12x + 3 = 0$
determine if this equation were factorable, it's not for this one
so I use quadratic formula, try to search the formula online

$x1 = \frac{-12 + \sqrt{(12)^{2} - 4*4*3} } {2*4} = \frac{-12 + 4\sqrt{6} }{8} = \frac{4(-3 + \sqrt{6}) }{8} = \frac{-3 + \sqrt{6}}{2} = - 0.28$
$x2 = \frac{-12 - \sqrt{(12)^{2} - 4*4*3} } {2*4} = \frac{-12 - 4\sqrt{6} }{8} = \frac{4(-3 - \sqrt{6}) }{8} = \frac{-3 - \sqrt{6}}{2} = - 2.72$

<span>x ≈ −2.72 and x ≈ −0.28 is the solution</span>

3 0

4 years ago

Let point C be between V and W on VW Given that VW = 61, VC = z + 13, and CW = z + 8, solve for z.

LenKa [72]

VW = VC + CW
61 = z + 13 + z + 8 = 2z + 21
2z = 61 - 21 = 40
z = 40/2 = 20
z = 20.

3 0

3 years ago