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Nikitich [7]
3 years ago
11

The sum of the speeds of two trains is 720.1 miles per hour. If the speed of the first train is 5.9 mph faster than that of the

second train, find the speeds of each
Mathematics
1 answer:
Troyanec [42]3 years ago
7 0
Train 1 = (x) = 357.1 mph
Train 2= (x + 5.9) = 363 mph
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A cylindrical piece of iron pipe is shown below. The wall of the pipe is 0.75 inch thick, and the pipe is open at both ends:
Vadim26 [7]

Answer:

Correct option: fourth one -> 254 cubic inches.

Step-by-step explanation:

The volume of a cylinder is given by the equation:

Volume = \pi * radius^2 * height

To calculate the internal volume of the pipe, we should use its internal radius.

The external radius of the pipe is half of the diameter, and the internal radius is the external radius minus the thickness of the pipe, so we have:

internal\ radius = external\radius - thickness\\internal\ radius = \frac{6}{2}  - 0.75\\internal\ radius = 2.25\ in

Then, using the internal radius in the volume equation, we have that:

Volume = \pi * 2.25^2 * 16

Volume = 254.47\ in3

So the correct option is the fourth one: Volume is approximately 254 cubic inches.

5 0
3 years ago
How can finding the number of solutions apply to the real world?<br> need answer fest plz
Inessa05 [86]

Answer:

it helps sharpen ur brain up for future so as not to be cheated by others

6 0
3 years ago
Estimate the radius of the object. Round to the nearest hundredth if necessary.
Zielflug [23.3K]

Answer:

The radius is 19.42 inches.

Step-by-step explanation:

Start with the formula for finding the circumference of a circle, which is C=2\pir.

Then, derive the formula in order to find the radius, which the formula should then look like r= C/2\pi.

Finally, plug in the corresponding numbers, which is r= 122 inches/ 2\pi. The final answer is 19.42 inches.

7 0
3 years ago
Can someone help me?
olya-2409 [2.1K]
All the properties of a parallelogram apply (the ones that matter here are parallel sides, opposite angles are congruent, and consecutive angles are supplementary).
All sides are congruent by definition.
The diagonals bisect the angles.
7 0
3 years ago
A plane flies round-trip to Philadelphia. It flies to Philadelphia at 220 miles per hour and back home with a tailwind at 280 mi
VMariaS [17]
1430 miles in 6.5 hours because you multiply 220 by 6.5 and equals 1430miles
8 0
4 years ago
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