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VLD [36.1K]
3 years ago
10

Can someone plz plz plz answer my question?Show your work or explain.I will give a thank u with 5 stars and Brainliest.

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
8 0
Well first change the feet per minute to feet per hour

440x60/60x60 = 26400 ft/hr

then convert it to miles by dividing by 5280

26400/5280 = 5

so the speed is 5 miles/hr

lastly, convert miles to kilometres


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3 years ago
Daca a = 3-5 si b= 4:3*9:2
Thepotemich [5.8K]
A={2,3,5}
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A piece of wire measuring 20 feet is attached to a telephone pole as a guy wire. The distance along the ground from the bottom o
dem82 [27]

Answer: Height at which the wire is attached to the pole is 12 feet.

Explanation:

Since we have given that

Length of the wire = 20 feet

Let the height at which wire is attached to the pole be h

and distance along the ground from the bottom of the pole to the end of the wire be x+4

Now, it forms  a right angle triangle so, we can apply "Pythagorus theorem".

H^2=B^2+P^2\\\\20^2=x^2+(x+4)^2\\\\400=x^2+x^2+8x+16\\\\400=2x^2+8x+16\\\\400=2(x^2+4x+8)\\\\200=x^2+4x+8\\\\x^2+4x-192=0\\\\x^2+16x-12x-192=0\\\\x(x+16)-12(x+16)=0\\\\(x+16)(x-12)=0\\\\x=-16\ and\ 12

But height cant be negative so, height will be 12 feet.

Hence, height at which the wire is attached to the pole is 12 feet.


8 0
3 years ago
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timurjin [86]

Answer: y= -4x+13

Step-by-step explanation:

7 0
3 years ago
What is the area of rectangle RSTU? Show step by step!
pickupchik [31]

Step-by-step explanation:

We only know 1 side, and that is the width of 4. We only have the diagonals at our side. Half of the diagonal is 5. As a result, the diagonal is 10. I want you to imagine a triangle that has a base of 4 and a hypotenuse of 10. Use the Pythagorean Theorem to find b, or the height.

a² + b² = c²

4² + b² = 10²

16 + b² = 100

100 - 16 = 84

b² = 84

b = √84

b ≈ 9.165

Now we know the length of the rectangle, which is about 9.165. Multiply that by 4 to get the area.

9.165 * 4

36 + 0.4 + 0.24 + 0.020

36.4 + 0.24 + 0.02

36.64 + 0.02

36.66 u²

The area of rectangle RSTU is about 36.66 units squared.

8 0
3 years ago
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