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Mkey [24]
3 years ago
13

Write a proof. Given 4 x+ 9 = 18 = -x/2 Prove x=2

Mathematics
1 answer:
Nadya [2.5K]3 years ago
6 0
You can prove that x=2 because if you work the equation out it will give you the estimated total. so multiple 4 and 2. you'll get 8, so add 8 and 9 and you'll get 18 :)
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Student Life Insurance Company wants to offer an insurance plan with a maximum claim amount of $5,000 for dorm students to cover
shusha [124]

Answer:

25 = 0.01*5000 - X* 0.99

And now if we solve for X we have this:

0.99 X = 50-25 =25

X= \frac{25}{0.99}=25.25

So then we conclude that they should be charge $25.25 for the insurance in order to have a profit of $25.

Step-by-step explanation:

Previous concepts

In statistics and probability analysis, the expected value "is calculated by multiplying each of the possible outcomes by the likelihood each outcome will occur and then summing all of those values".

For this case we can use the definition of expected value given by:

E(X) =\sum_{i=1}^n X_i P(X_i)

Solution to the problem

For this case we know that the probabiity of maximum claim is 0.01, so then the probability of no maximum claim by the complement rule is 1-0.01=0.99

And we know that the plan with maximum claim gives an amount of $5000

Let X the charge for the premium insurance

We also know that the profit or the expected value would be 25 for the company

If we apply the concept of expected value we have this:

25 = 0.01*5000 - X* 0.99

And now if we solve for X we have this:

0.99 X = 50-25 =25

X= \frac{25}{0.99}=25.25

So then we conclude that they should be charge $25.25 for the insurance in order to have a profit of $25.

8 0
4 years ago
Factorize the following expressions​
ValentinkaMS [17]

Answer:

6) b(3a^4-5c³)

7) 3x³yz(2x+5y)

8) 4a²b²c³(2bc-3a)

9) 4xy(2y+7z-1)

10) 2mn(5n²+2m-3n)

Step-by-step explanation:

6) Factor out the b and you get b(3a^4-5c³)

7) Factor out the 3x³yz and you get 3x³yz(2x+5y)

8) Factor out the 4a²b³c³ and you get 4a²b²c³(2bc-3a)

9) Factor out the 4xy and you get 4xy(2y+7z-1)

10) Factor out the 2mn and you get 2mn(5n²+2m-3n)

7 0
3 years ago
(hg^(-3))/(w^(-4) k^0 )
Svetlanka [38]
One may note you never quite asked anything, now, assuming simplification,

\bf ~~~~~~~~~~~~\textit{negative exponents}\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}
\\\\
-------------------------------\\\\
\cfrac{hg^{-3}}{w^{-4}k^0}\implies \cfrac{hw^4}{g^3(1)}\implies \cfrac{hw^4}{g^3}
4 0
3 years ago
Identify the two variables that make up the relation described in this statement: The area of a circle depends on the length of
nlexa [21]
The area and the radius.
3 0
4 years ago
Read 2 more answers
If the product of two positive numbers is forty eight, and one number is two greater than the other, what are the two numbers?
Natalija [7]
X(x+2) = 48
x^2 + 2x = 48
x^2 + 2x - 48 = 0 
*Use quadratic formulae*
x = 6
Numbers are 6 and 8
4 0
4 years ago
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