All categories

2 years ago

Solve: -3x = 15 you can get the brainiest

Mathematics

1 answer:

kaheart [24]2 years ago

4 0

If you times -3 by -5 the negatives cancel eachother and therefore you get 15.

You might be interested in

The total claim amount for a health insurance policy follows a distribution with density function 1 ( /1000) ( ) 1000 x fx e− =

gizmo_the_mogwai [7]

Answer:

the approximate probability that the insurance company will have claims exceeding the premiums collected is $\mathbf{P(X>1100n) = 0.158655}$

Step-by-step explanation:

The probability of the density function of the total claim amount for the health insurance policy is given as :

$f_x(x) = \dfrac{1}{1000}e^{\frac{-x}{1000}}, \ x> 0$

Thus, the expected total claim amount $\mu$ = 1000

The variance of the total claim amount $\sigma ^2 = 1000^2$

However; the premium for the policy is set at the expected total claim amount plus 100. i.e (1000+100) = 1100

To determine the approximate probability that the insurance company will have claims exceeding the premiums collected if 100 policies are sold; we have :

P(X > 1100 n )

where n = numbers of premium sold

$P (X> 1100n) = P (\dfrac{X - n \mu}{\sqrt{n \sigma ^2 }}> \dfrac{1100n - n \mu }{\sqrt{n \sigma^2}})$

$P(X>1100n) = P(Z> \dfrac{\sqrt{n}(1100-1000}{1000})$

$P(X>1100n) = P(Z> \dfrac{10*100}{1000})$

$P(X>1100n) = P(Z> 1) \\ \\ P(X>1100n) = 1-P ( Z \leq 1) \\ \\ P(X>1100n) =1- 0.841345$

$\mathbf{P(X>1100n) = 0.158655}$

Therefore: the approximate probability that the insurance company will have claims exceeding the premiums collected is $\mathbf{P(X>1100n) = 0.158655}$

4 0

2 years ago

Substitute x = 5 into the expression (-2)x + 6. Do you get -4? Substitute x = -1 into the expression (-2)x + 6. Do you get - 4 W

8090 [49]

Answer:The first method, by substituting 5 into the expression (-2)x + 6 gives the coreect answer of -4

Step-by-step explanation:

Ist method

Substituting x = 5 into the expression (-2)x + 6, we have

(-2) 5 + 6,

=-10 + 6

=-4

2nd method

Substitute x = -1 into the expression (-2)x + 6,we have

(-2)(-1) + 6

2 +6=10

The first method, by substituting 5 into the expression (-2)x + 6 gives the coreect answer of -4

7 0

2 years ago

What is the value of 4 + 5x when x = 3?

Schach [20]

Answer:

Step-by-step explanation:

5 times 3 is 14 plus 4 is 19

6 0

3 years ago

Read 2 more answers

Which of these is equivalent to -x < 8?:<br> x < 8<br> x < -8<br> x > 8<br> x > -8

adell [148]

Answer:

x>-8

Step-by-step explanation:

multiply both sides with -1

6 0

3 years ago

Read 2 more answers

A skateboard that sells for $65 is on sale for 15% off. Find the sale price. 16.25 Correct Answer: Great job! Question 3 (multip

bezimeni [28]

So you can multiply 65 by 15% or .15 and get 9.75

Subtract that from 65 and get $55.25 as the sales price

5 0

3 years ago