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kompoz [17]
3 years ago
15

Find the value of x. The diagram is not to scale. A. 90. B. 35. C. 45. D. 145.

Mathematics
2 answers:
maks197457 [2]3 years ago
8 0
The answer D or A 
please give it the Brainiest answer 
SIZIF [17.4K]3 years ago
7 0

Answer:

The value of x is 45°

Option C is correct.

Step-by-step explanation:

Given the figure of pentagon in which measure of interior angles are

∠1=90°, ∠2=148°, ∠3=(3x+10)°, ∠4=x°, ∠5=112°

we have to find the value of x

As the sum of the internal angles in a simple pentagon is 540°.

∴ ∠1+∠2+∠3+∠4+∠5=540°

90°+148°+(3x+10)°+x°+112°=540°

4x+360°=540°

4x=540-360

4x=180

x=45

Hence, the value of x is 45°

Option C is correct.

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An Internet reaction time test asks subjects to click their mouse button as soon as a light flashes on the screen. The light is
Ganezh [65]

Answer:

(a) 0.20

(b) 31%

(c) 2.52 seconds

Step-by-step explanation:

The random variable <em>Y</em> models the amount of time the subject has to wait for the light to flash.

The density curve represents that of an Uniform distribution with parameters <em>a</em> = 1 and <em>b</em> = 5.

So, Y\sim Unif(1,5)

(a)

The area under the density curve is always 1.

The length is 5 units.

Compute the height as follows:

\text{Area under the density curve}=\text{length}\times \text{height}

                                          1=5\times\text{height}\\\\\text{height}=\frac{1}{5}\\\\\text{height}=0.20

Thus, the height of the density curve is 0.20.

(b)

Compute the value of P (Y > 3.75) as follows:

P(Y>3.75)=\int\limits^{5}_{3.75} {\frac{1}{b-a}} \, dy \\\\=\int\limits^{5}_{3.75} {\frac{1}{5-1}} \, dy\\\\=\frac{1}{4}\times [y]^{5}_{3.75}\\\\=\frac{5-3.75}{4}\\\\=0.3125\\\\\approx 0.31

Thus, the light will flash more than 3.75 seconds after the subject clicks "Start" 31% of the times.

(c)

Compute the 38th percentile as follows:

P(Y

Thus, the 38th percentile is 2.52 seconds.

4 0
3 years ago
I dont understand it :/​
photoshop1234 [79]

Step-by-step explanation:

It's telling you to plug in the numbers inside the parenthesis as x

Example: F(-1)= 2(-1)^3 -3(-1)^2 +7

4 0
3 years ago
Juan has 12 pencils. two-thirds of these pencils are sharpned which model represents the number of sharpend pencils juan has?
Oduvanchick [21]

Answer:

8

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Who feels to talk
zubka84 [21]

Answer:

I gotcu

The answer is 30.25

Step-by-step explanation:

5.5 divided by 4 equals 1.375

22 times 1.375 equals 30.25

8 0
3 years ago
The expression 120-15x represents how many invitations Luanne has to address after x days. The expression 120 + 15(7-x) represen
Aloiza [94]

Answer:

not possible.

Step-by-step explanation:

number of invitations luanne  has to address after x days = 120-15x

number of invitations  Darius has to address after x days =  120 + 15(7-x)

so, if the number of invitations should be the same for both of them,

we have to equate their number of invitations

120-15x =  120 + 15(7-x)

subtracting 120 from both the sides,

-15x = 15(7-x) = 105 -15x

adding we 15x on both sides, we wont find any solution for x.

so, this isnt possible or the question must be wrong.

8 0
3 years ago
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