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TiliK225 [7]
3 years ago
10

Please Help!!!!! Trina has two spinners. One spinner has 4 equal sections that are numbered 1 through 4. The other spinner has 5

equal sections that are numbered 1 through 5. Trina spins both spinners at the same time.
The random variable X is the sum of the numbers on which the spinners land. What is P(5≤X≤8) ?  

Enter your answer, in simplest fraction form, in the box
Mathematics
2 answers:
RSB [31]3 years ago
7 0

Given:

Spinner 1 = 1, Spinner 2 = 4,5 <span>
Spinner 1 = 2, Spinner 2 = 3,4,5 
Spinner 1 = 3, Spinner 2 = 2,3,4,5 
Spinner 1 = 4, Spinner 2 = 1,2,3,4 

</span>

There are possibly 13 outcomes.<span>

</span>

<span>
<span>P(5≤X≤8) = 13/(4*5) = 13/20</span></span>

LuckyWell [14K]3 years ago
5 0

Answer:

13/20

<em>This is the correct answer! Good luck! </em>

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If tanA = 1/2 then evaluate cos A/sinA +sinA /1+cosA​
Deffense [45]

Answer:

√5.

Step-by-step explanation:

Tan A = 1/2 means that the right triangle containing angle A has legs of length 1 and 2 units. So the hypotenuse  = √(1^2 + 2^2) = √5  (using the Pythagoras theorem). The side opposite to < A = 1 unit and the adjacent side = 2 (as tan = opposite / adjacent).

so cos A =  adjacent / hypotenuse =   2/√5.

and sin A = opposite / hypotenuse = 1 / √5

cos A / sin A = 2/√5 /  1/ √5 =  2.

sin A / (1 + cos A) =  1/√5 (1 + 2/ √5)

=  1 / √5 ( (√5 + 2) /√5)

= 1 / (√5 + 2)

So the answer is:

2  +   1 /(√5 + 2).

We can simplify it further by multiplying top and bottom of the fraction by the complement of √5 + 2 which is √5 - 2.

2 + 1 / (√5 + 2)

= 2(√5 + 2) + 1 / (√5 + 2 )

= { 2(√5 + 2) + 1 } /  (√5 + 2)

Multiplying this by  √5 - 2 / √5 - 2 we get:

(2(5 - 4) + √5 - 2) /  (5 -4)

=  2 + √5 - 2 / 1

= √5.

3 0
3 years ago
Help? any one can ear brailest
Vitek1552 [10]

Answer: I think best answer for this equation is A

Step-by-step explanation:but just to be exactly sure I suggest using homeworkla .org just to be sure, but I'm positive it's A.

hope this helps :3

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