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9966 [12]
3 years ago
7

a red lamp flashes every 10 seconds ,a yellow lamp flashes every 24 seconds and a blue lamp flashes every 30 seconds.How many ti

mes will the three lamps flash at the same time in 10 minutes.​
Mathematics
1 answer:
jeka57 [31]3 years ago
7 0

Answer:

600x

Step-by-step explanation:

10 x 24x 30 - 10x 60x

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Combine Like Terms <br><br> 8 + 19t - 6t<br><br> A) 8 - 13t<br> B) 21<br> C) 21t<br> D) 8 + 13t
Hunter-Best [27]

Answer:

8 + 13t

Step-by-step explanation:

Since 19t and 6t have the same variables

4 0
3 years ago
There are 12 boys and 20 students. What is the ratio of girls to boys​
saw5 [17]
<h3>Answer: so 3 goes into 12 4 times and 5 times 4 is 20.   Step-by-step explanation: </h3>
8 0
3 years ago
1 ≥ x - 9 <br> Find out what x means.
BigorU [14]
So first +9 to both sides to isolate the variable. Then you’ll be left with 10 is greater than or equal to x. So if you switch the terms around it’ll be x is less than or equal to 10. Values that are less than or equal to 10 are like 10,9,8,7,etc.
6 0
3 years ago
A track and field playing area is in the shape of a rectangle with semicircles at each end . The perimeter of the track is to be
MAVERICK [17]
We can let the radius of the semi circles be r and x can be the length of the rectangle.
The perimeter will be Perimeter = 2x + 2pr = 1200
The area of the rectangle is Area = x(2r)
 Once we solve the perimeter equation, you get x = 600.
Put this into the area equation and you get Area = (600 - pr)(2r)
The maximum then gives r = 95. 493 and area 57, 295.8
Dimensions

Height is twice the radius or 190.986. Find base use equation x = 600 - p(95.493) = 300.

This means dimensions are 300 by 190.986 
5 0
3 years ago
King Kong stands on the edge of the roof of a 62 foot high building. You poke your head out of a manhole and measure the angles
Oliga [24]

Answer:

46.55 feet (approx).

4.48 feet ( approx )

Step-by-step explanation:

Let x be distance manhole from the building. ( in feet ) and y be the height of the King Kong.

∵ The angles of elevation to the top of King Kong's head and to his feet are 55 degrees and 53.1 degrees respectively.

By the trigonometric ratio,

\tan 53.1^{\circ}=\frac{62}{y}

\implies y =\frac{62}{\tan 53.1^{\circ}}\approx 46.55

Thus, the distance of the manhole from the building would be 46.55 feet (approx).

Again by the trigonometric ratio,

\tan 55^{\circ}=\frac{62+x}{46.55}

\tan 55^{\circ}\times 46.55=62 + x

66.48 = 62 + x

\implies x = 66.48 - 62 = 4.48

Hence, King Kong is approximately 4.48 feet long.

7 0
3 years ago
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