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3 years ago

4.2/6 = 1.4/x Solve for x.

Mathematics

2 answers:

Leni [432]3 years ago

6 0

Answer:

x=2

Step-by-step explanation:

You cross-multiply 4.2 and x to get 4.2x. You then cross-multiply 6 and 1.4 to get 8.4. Then you divide 4.2x and 8.4 to get 2... Hope this helps!

Nastasia [14]3 years ago

3 0

X=2 is your answer
It’s cross multiply and divide

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3241004551 [841]

Answer:

1.Make the circle open

2.put the dot on 5

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Step-by-step explanation:

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Read 2 more answers

An aquarium 2 m long, 1 m wide, and 1 m deep is full of water. Find the work (in J) needed to pump half of the water out of the

Nitella [24]

Answer:

$W=2452.5 J$

Step-by-step explanation:

The work is define as the integral of the force times distance. So we have:

$W=\int^{a}_{b}Fxdx$

Now, we can write the force in terms of density.

$F=m*g=\rho Vg$

V is the volume (V=2*1*1=2 m³)

So the work will be:

$W=\int^{0.5}_{0} 2*1000*9.81*xdx=\int^{0.5}_{0} 2*1000*9.81*xdx=\int^{0.5}_{0}19620xdx=19620(\frac{x^{2}}{2})|^{0.5}_{0}$

The limit of integration is between 0 and 0.5 because we want to pump half of the water out of the aquarium.

$W=19620(\frac{x^{2}}{2})|^{0.5}_{0}=19620(\frac{0.5^{2}}{2})$

$W=2452.5 J$

I hope it helps you!

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Answer:

Step-by-step explanation:

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