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3 years ago

Please please help .. Really need answer asap please and thank you

Mathematics

1 answer:

natta225 [31]3 years ago

6 0

A is the answer I hope e2020 is going good for you

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Somebody pls pls help me with this I’ll mark u brainliest

Andre45 [30]

Answer:

Step-by-step explanation:

The angle of a line is 180 degrees. A right angle is 90 degrees, and the given angle is 55 degrees. All you have to do is add 90 and 55, and subtract that sum from 180.

7 0

3 years ago

In a lumberjack competition, a contestant is blindfolded and then spun around 9 times. The contestant then immediately tries to

Kazeer [188]

Answer:

9.364 is the expected number of points.

we can approximate this to 10 points if we want a whole number

Step-by-step explanation:

We have these variables:

[0,5,10,15]

P(x= 0) = p(y>20)+p(y<-20) = 2p(y>20)

P(x=5) = p(-20<=y<=10)+p(10<=y<=20) = 2p(10<=y<=20)

P(x=10) = p(-10<=y<=-3)+p(3<=y<=10) = 2p(3<=y<=10)

P(x=15) = p(-3<=y<=3) = 2p(0<=y<=3)

Z = y/10

Therefore

P(x= 0) = 2(y>20)

= 2p(z>2) = 2(1-p<=2)

= 2(1-0.9772)

= 0.0456

P(x= 5)

= 2p(10<=y<=20)

= 2p(1<=z<=2)

= 2(0.9772-0.8413)

= 0.2718

P(x= 10)

= 2p(3<=y<=10)

= 2p(0.3<=z<=1)

= 2(0.8413-0.6179)

= 0.4468

P(x = 15)

= P(0.6179-0.3821)

= 0.2358

To get expected value of Y

0(0.0456)+5(0.2718)+10(0.4468)+15(0.2358)

= 1.359 + 4.468 + 3.537

= 9.364

E[Y] = 9.364

8 0

3 years ago

Find the sum of the first 100 terms in the series

iVinArrow [24]

Hello,

$\dfrac{1}{n} - \dfrac{1}{n+1} = \dfrac{1}{n(n+1)} \\

 \dfrac{1}{1*2} = \dfrac{1}{1} - \dfrac{1}{2} \\

 \dfrac{1}{2*3} = \dfrac{1}{2} - \dfrac{1}{3} \\

 \dfrac{1}{3*4} = \dfrac{1}{3} - \frac{1}{4} \\

...\\
 \dfrac{1}{n*(n+1)} = \dfrac{1}{n} - \dfrac{1}{n+1} \\



$

Adding member by member, we have

$\dfrac{1}{1*2} + \dfrac{1}{2*3} +\dfrac{1}{3*4} +...\dfrac{1}{n*(n+1)}=\\
 
\dfrac{1}{1} - \dfrac{1}{n+1} \\

= \dfrac{n}{n+1} \\

$

if n=100 sum $\boxed{= \dfrac{100}{101} }$

3 0

3 years ago

What method can you use to find the area of the composite figure? Select three options.

Mashutka [201]

Step-by-step explanation:

<h2>This problem bothers on the mensuration of flat shapes, composite rectangle. </h2>

The correct method for finding the area of a composite rectangle with a large rectangle and a small rectangle connected on the right side are highlighted below.

also see attached the rough sketch of the two rectangles.

Decompose the figure into two rectangles and add the areas
Extend the top and rightmost sides to make a larger rectangle, find its area, and then subtract the area of the removed corner.
Decompose the figure into two rectangles, find their sum, and then subtract the area of the removed corner.

8 0

4 years ago

Read 2 more answers

Which expression is equivalent to 36 + 54?

Pavel [41]

The answer to 36 + 54 is 90

8 0

4 years ago