4 years ago

А

Mathematics

1 answer:

lapo4ka [179]4 years ago

7 0

Answer:

coefficient

Step-by-step explanation:

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Solve the following equation for a number x. Check that your solution is correct. <br> 7(2x-5)=4x+15

andrezito [222]

Answer:

x=5

Step-by-step explanation:

I hope this helps you!

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3 years ago

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luis has three more quarters than dimes in his pocket, for a total of $1.80. How many dimes (x) are in his pocket

Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

In this case, Luis has 6 quarters, and 3 dimes. 6 - 3 = 3, and it works out to the following:

6 • 0.25 = 1.50

3 • 0.10 = 0.30

1.50 + 0.30 = 1.80

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3 years ago

When subtracting 7.6 from a certain number, the result is 48.99, as seen below. What number should go in the box to complete the

viva [34]

Really You Can Just Add It To Get The Answer 48.99 + 7.6 = 56.59

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3 years ago

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Find the lateral area, surface area and volume of the cube

Vika [28.1K]

Answer:

Lateral Area = 13 x 13 x 4 = 676 ft²

Surface area = 13 x 13 x 6 = 1014 ft²

Volume = 13 x 13 x 13 = 2197 ft³

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3 years ago

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!

8 0

3 years ago