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LekaFEV [45]
2 years ago
11

Helppppppppppppppppppppppppppppppppppppp

Mathematics
2 answers:
Vera_Pavlovna [14]2 years ago
4 0

Answer:

d

Step-by-step explanation:

bearhunter [10]2 years ago
4 0

Answer:

  • D. x^2 - 4x - 12.

Step-by-step explanation:

<u>Given expression:</u>

  • (x - 6)(x + 2) =

<u>Solve to get the power:</u>

  • (x - 6)(x + 2)
  • = (x - 6)x^2
  • = x^2 - 4x - 12.

Your answer is D.

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Pythagorean’s 14 in 15 in x
Flura [38]

Answer:

210x

Step-by-step explanation:

5 0
3 years ago
Kate has a kite with the dimensions shown below. What is the value of X?
sergij07 [2.7K]
Hey there! :D

We will use the properties of similar triangles to figure this out. 

We will use two triangles inside the kite, with sides with the value of "x". 

Smaller triangle:

Smaller side= 11

Bottom side= x

Bigger triangle:

Smaller side= x

Bottom side= 25

\frac{11}{x} = \frac{x}{25}

Cross multiply. 

25*11= 275

x*x= x^{2}

Find the square root. 

√275= 16.583.... 

Or 5√11. 

I hope this helps!
~kaikers

6 0
3 years ago
Berniece solved the following equation:
aniked [119]

Answer:

Step 4.

Step-by-step explanation:

To isolate the x variable, she subtracts 8 from both sides making it another subtraction property of equality justification.

5 0
3 years ago
Jerome bought 15 videos from a department store. Some videos were new releases, x, which cost $19, and some videos were classics
Neporo4naja [7]

Answer:

The system of equations is

x+y=15

19x+8y=164

Step-by-step explanation:

Let

x------> the number of videos of new releases

y-----> the number of classics videos

we know that

x+y=15 ------> equation A

19x+8y=164 ------> equation B

Using a graphing tool

Solve the system of equations

Remember that the solution of the system of equations is the intersection point both graphs

The intersection point is (4,11)

see the attached figure

therefore

the number of videos of new releases is 4

the number of classics videos is 11

3 0
3 years ago
Read 2 more answers
The​ life, in​ years, of a certain type of electrical switch has an exponential distribution with an average life β=44. If 100 o
Bond [772]

Answer:

0.9999

Step-by-step explanation:

Let X be the random variable that measures the time that a switch will survive.

If X has an exponential distribution with an average life β=44, then the probability that a switch will survive less than n years is given by

\bf P(X

So, the probability that a switch fails in the first year is

\bf P(X

Now we have 100 of these switches installed in different systems, and let Y be the random variable that measures the the probability that exactly k switches will fail in the first year.

Y can be modeled with a binomial distribution where the probability of “success” (failure of a switch) equals 0.0225 and  

\bf P(Y=k)=\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}

where  

\bf \binom{100}{k} equals combinations of 100 taken k at a time.

The probability that at most 15 fail during the first year is

\bf \sum_{k=0}^{15}\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}=0.9999

3 0
3 years ago
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