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3 years ago

Plz help ill give you brainlist

Mathematics

1 answer:

Nana76 [90]3 years ago

8 0

1=3
2=4
1+2=180; 2+3=180; 3+4=180; 4+1=180

180=94+n
n=86

86=x+64
x=22

94=y-37
y=131

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Find the mean of 25 numbers if the mean of 15 of them is 18 and the mean of the rest is 13

sergij07 [2.7K]

Given the mean of 15 of them is 18 and the mean of the rest is 13

And the total numbers are 25

So,

First, we need to find the sum of all numbers

the mean of 15 of them is 18

so, the sum of the 15 numbers are = 18 * 15 = 270

The rest of the numbers = 25 - 15 = 10

the mean of the rest is 13

so, the sum of the rest = 13 * 10 = 130

so, the sum of all numbers = 270 + 130 = 400

so, the mean of the all numbers =

$\frac{400}{25}=16$

So, the answer is, mean = 16

7 0

2 years ago

Geometry. BE is a tangent to CDE is a secant of circle p. What is the length of BE, rounded to the nearest m?

meriva

Answer:

BE ≈ 92 m

Step-by-step explanation:

Given a tangent and a secant from an external point to the circle, then

The square of the tangent is equal to the product of the external part of the secant and the entire secant, that is

BE² = 59(59 + 83) = 59 × 142 = 8378 ( take the square root of both sides )

BE = $\sqrt{8378}$ ≈ 92 m ( to the nearest metre )

4 0

4 years ago

The set S = {x|-11 < x < 2} is described by which interval notation?

Alla [95]

They are open ended because -11 and 2 are not included in the interval.

<h3>Linear inequality in interval notation</h3>

Linear equations are expression not separated by an equal sign.

Given the inequality S = {x|-11 < x < 2}

This means that the values in the interval is between -11 and 2, the expression in interval notation will be given as;

(-11, 2). Note that they are open ended because -11 and 2 are not included in the interval.

Learn more on interval notation here: brainly.com/question/13160076

#SPJ1

3 0

2 years ago

PLSSSS HELPPP I WILLL GIVEEE BRAINLIESTTTT!!!!!!!!!!!!!!!!!

d1i1m1o1n [39]

Answer:

Step-by-step explanation:

-3x+4

-3(-4)+4

12+4

5 0

3 years ago

Read 2 more answers

1) A triangular prism has a base measuring 8 inches and a side measuring 5

Kruka [31]

Answer:

24 cubic inches

Step-by-step explanation:

Whenever you are finding the volume you have to multiply by two plus a number times two. For example, since there is two depths, you have to multiply 3 by 2 plus the next number. Then, since there is two sides, you multiply 5 by 2 plus the next number. Finally, since there is only one base, you don't have to multiply by two.

(3×2)+(5×2)+8=24

Hope I explained well enough for you to understand.

4 0

3 years ago