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ohaa [14]
4 years ago
13

A 15 foot board rest against a wall. The angle that the board makes with the ground is 60 degrees. How far is the base of rhe bo

ard away from the wall
Mathematics
1 answer:
Iteru [2.4K]4 years ago
5 0

Answer:

7.5'

Step-by-step explanation:

Use trigonometry.

Draw it out.

the hypotenuse is 15.

You want to find the adjacent side.

Use cosine (the adjacent over hypotenuse)

cos60=A/15

15cos60=A

7.5=A

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3 years ago
Help me!!! I really need help!​
Bad White [126]

Hello!

Answer:

The amount is-

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Step-by-step explanation:

18+12

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18

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Hope this helps have a good day! <3

8 0
3 years ago
3 of the digits 0-9 are chosen randomly by a computer what is the probability that it will choose 3 sequential digits?
Sindrei [870]

Answer:

B. 1/15

Step-by-step explanation:

The number of ways in which we can select x elements from a group of n elements is calculated as:

nCx=\frac{n!}{x!(n-x)!}

So, the number of ways in which a computer can select 3 digits is calculated as:

10C3=\frac{10!}{3!(10-3)!}=120

Because there are 10 digits from 0 to 9.

Then, from that 120 options there are 8 that have 3 sequential digits. These options are:

{0,1,2} {1,2,3} {2,3,4} {3,4,5} {4,5,6} {5,6,7} {6,7,8} {7,8,9}

So, the probability that it will choose 3 sequential digits is equal to:

P=\frac{8}{120}=\frac{1}{15}

7 0
3 years ago
What is the coefficient of x^6 y^4 in the expansion of (x+y)^10
insens350 [35]

c) 210

hope this helps!

7 0
3 years ago
What is 4% of 25?.....
kow [346]

Answer:

1

Step-by-step explanation:

multiply 25 by .04

8 0
3 years ago
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