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Arte-miy333 [17]
3 years ago
7

What does this equal?

Mathematics
2 answers:
elena55 [62]3 years ago
7 0
The answer is -38/8
Ludmilka [50]3 years ago
6 0
Use the photo Math calculator the answer would be on their
You might be interested in
Solids whose bases are equal patrolled polygons and whose sides are parallelograms are called
olga_2 [115]

A solid whose top and base are congruent polygons and lateral faces are parallelograms is called <u>prism</u>.

<h3>What is prism?</h3>

A prism is a polyhedron made up of n parallelogram faces that connect the n-sided polygon basis, the second base, which is a translated duplicate of the first base, and the n faces. Translations of the bases are found in all cross-sections that are parallel to them.

<h3>What is congruent polygons?</h3>

If the corresponding sides and angles of two polygons are identical, then the polygons are congruent. It should be noted that two sides are congruent if their lengths are the same, and that an angle is congruent if its measure is the same.

To know more about prism visit:

brainly.com/question/12649592

#SPJ4

I understand that the question you are looking for is:

A solid whose top and base are congruent polygons and lateral faces are parallelograms is called _____.

A. prism

B. polyhedron

C. sphere

D. cone

3 0
2 years ago
Please help me with the question
mars1129 [50]

(i) The mean is

\displaystyle E(X) = \sum_x x \, P(X = x) \\\\ E(X) = 1\cdot0.175 + 2\cdot0.315 + 3\cdot0.211 + 4\cdot0.092 + 5\cdot0.207 \\\\ \boxed{E(X) = 2.839}

The variance is

V(X) = E((X - E(X))^2) = E(X^2) - E(X)^2

Compute the second moment E(X^2) :

\displaystyle E(X^2) = \sum_x x^2 \, P(X = x) \\\\ E(X) = 1^2\cdot0.175 + 2^2\cdot0.315 + 3^2\times0.211 + 4^2\times0.092 + 5^2\times0.207 \\\\ E(X^2) = 9.997

Then the variance is

\boxed{V(X) \approx 1.9171}

(ii) For a random variable Z=aX+b, where a,b are constants, we have

E(Z) = E(aX+b) = E(aX) + E(b) = a E(X) + b

and

V(Z) = E((aX+b)^2) - E(aX+b)^2 \\\\ V(Z) = E(a^2 X^2 + 2ab X + b^2) - (a E(X) + b)^2 \\\\ V(Z) = a^2 (E(X^2) - E(X)^2) \\\\ V(Z) = a^2 V(X)

Then for Y=\frac{X+3}2, we have

E(Y) = \dfrac12 E(X) + \dfrac32 \\\\ \boxed{E(Y) = 2.918}

E(Y^2) = E\left(\left(\dfrac{X+3}2\right)^2\right) = \dfrac14 E(X^2) + \dfrac32 E(X) + \dfrac94 \\\\ \boxed{E(Y^2) \approx 9.0028}

3 0
2 years ago
Can someone tell me what is 6=2(y+2)
tatuchka [14]

Distribute the 2 through the parentheses

on the right side of the equation.

2(y) is 2y and 2(2) is 4.

So the problem now reads 6 = 2y + 4.

Now we can subtract 4 from both

sides of the equation to get 2 = 2y.  

Now divide both sides of the

equation by 2 and <em>1 = y</em>.

8 0
3 years ago
Read 2 more answers
Find the unknown value.
LiRa [457]

Answer:

i dont know

Step-by-step explanation:

48 divided by 16

4 0
3 years ago
Read 2 more answers
what is the algebraic equation for three times the sum of a number and seven is two less than five times the number.
OLga [1]
Let n represent the number.

"the sum of a number and 7" is (n+7)

Three times "the sum of a number and 7" is 3(n+7)

"is" translates to "=".

"five times the number" is 5n

Two less than "five times the number" is 5n-2

Your equation is
  3(n+7) = 5n-2
8 0
4 years ago
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