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melamori03 [73]
3 years ago
13

An escalator lifts people to the second floor of a building, 28 ft

Mathematics
1 answer:
Marysya12 [62]3 years ago
4 0

9514 1404 393

Answer:

  56 ft

Step-by-step explanation:

The geometry can be modeled by a right triangle with an unknown hypotenuse, and a side opposite the 30° angle that is 28 ft.

  sin(30°) = (28 ft)/hypotenuse

  hypotenuse = (28 ft)/sin(30°) = 56 ft

The length of the escalator is 56 feet.

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Natali [406]
So you’d add 5 and 3 so it’s 8 ft/s

You then divide 220/8

So it should be 27.5 seconds.

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5 0
2 years ago
In a class of 23 student the girls were 7 more than the boys how many boys were in the class​
Softa [21]

Answer:

x=# of boys

x+7=# of girls

x+x+7=25

2x+7=25

2x=25-7

2x=18

x=18/2

x=9 boys

x+7=16 girls

 

If you don't understand variables use trial and error.

 

Boys     Girls

1           8

2           9

3           10

4           11

5           12

6           13

7           14

8           15

9           16   9+16=25 students

 

You could start this way...

 

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5 0
3 years ago
Please help me need ASAP
Anton [14]

Answer:

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3 0
2 years ago
Read 2 more answers
While traveling along a highway a driver slows from 48 m/s to 30 m/s in 24 seconds. What is theautomobile’s acceleration?a.+ 0.7
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Step-by-step explanation:

6 0
3 years ago
I need help in this section.
Phoenix [80]

Answer:

\frac{1}{45}

Step-by-step explanation:

There are

2 yellow

3 magenta

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marbles in the bag.

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We have to multiply the probability of yellow on first pick by the probability of yellow on second pick (WITHOUT REPLACEMENT).

We denote P(Y1) as probability of yellow on first draw &

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Now,

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P(Y1) * P(Y2) = 1/5 * 1/9 = 1/45

The probability is  \frac{1}{45}

6 0
2 years ago
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