All categories

2 years ago

Can someone please help me with this assignment?

Mathematics

2 answers:

Varvara68 [4.7K]2 years ago

7 0

Answer:

Step-by-step explanation:

alisha [4.7K]2 years ago

5 0

Answer:

75x^4

Step-by-step explanation:

Use x^a/x^b=x^a-b rule to help. 100-25=75, and x^7-x^3=x^4. Combine them to get answer.

You might be interested in

Not right answer... Help

Igoryamba

Answer: -6

Step-by-step explanation:

3 0

3 years ago

nicole will rent a car for the weekend. she can choose one of two plans the first plan has an initial fee of $53 and cost an add

faltersainse [42]

Step-by-step explanation:

what's the question??

8 0

2 years ago

Line Segment AB has a slope of 1/3 and line segment CD has a slope of 1/3. This proves that

Elena L [17]

Answer:

Step-by-step explanation:

Parallel lines have equal slopes, thus

line AB is parallel to line CD

8 0

3 years ago

Suppose X has an exponential distribution with mean equal to 23. Determine the following:

e-lub [12.9K]

Answer:

a) P(X > 10) = 0.6473

b) P(X > 20) = 0.4190

c) P(X < 30) = 0.7288

d) x = 68.87

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

Mean equal to 23.

This means that $m = 23, \mu = \frac{1}{23} = 0.0435$

(a) P(X >10)

$P(X > 10) = e^{-0.0435*10} = 0.6473$

P(X > 10) = 0.6473

(b) P(X >20)

$P(X > 20) = e^{-0.0435*20} = 0.4190$

P(X > 20) = 0.4190

(c) P(X <30)

$P(X \leq 30) = 1 - e^{-0.0435*30} = 0.7288$

P(X < 30) = 0.7288

(d) Find the value of x such that P(X > x) = 0.05

$P(X > x) = e^{-\mu x}$

$0.05 = e^{-0.0435x}$

$\ln{e^{-0.0435x}} = \ln{0.05}$

$-0.0435x = \ln{0.05}$

$x = -\frac{\ln{0.05}}{0.0435}$

$x = 68.87$

5 0

3 years ago

I need help on. this question. (3x^6)^3 the answer must have one exponent

kotykmax [81]

Answer:

$27x^{18}$

Step-by-step explanation:

$\left(3x^6\right)^3$

Separate $3x^6$ :

$3^3\times\left(x^6\right)^3$

$27\times\left(x^6\right)^3$

$27x^{6\times3}$

$27x^{18}$

5 0

3 years ago