Create a table and a graph from the equation y=4x

Negative 3 times negative x equals?

Anon25 [30]

Answer: 3x

Step-by-step explanation:

8 0

3 years ago

5. Solve the system: x + 3y = -5 5x - 2y = 9

goldenfox [79]

Answer:

Step-by-step explanation:

x=1

y= -2

See step by step explanation below:

5 0

2 years ago

Read 2 more answers

What’s the answer to number 10 pleaseeee

elixir [45]

Answer:

490 square feet

Step-by-step explanation:

Please see attached picture for full solution.

6 0

4 years ago

If 7x + 11 = 39, then 7x = 28. Name property

Bogdan [553]

Answer: Subtraction Property of Equality

Step-by-step explanation: The Subtraction Property of Equality tells us that

we can subtract the same quantity, or equal quantities,

from both sides of an equation.

To get from the statement 7x + 11 = 39 to 7x = 28,

we subtract 11 from both sides to get 7x = 28.

5 0

4 years ago

The probability that your call to a service line is answered in less than 30 seconds is 0.75. Assume that your calls are indepen

vfiekz [6]

Answer:

a) 0.2581

b) 0.4148

c) 17

Step-by-step explanation:

For each call, there are only two possible outcomes. Either they are answered in less than 30 seconds. Or they are not. The probabilities for each call are independent. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem we have that:

$p = 0.75$

a. If you call 12 times, what is the probability that exactly 9 of your calls are answered within 30 seconds? Round your answer to four decimal places (e.g. 98.7654).

This is $P(X = 9)$ when $n = 12$ . So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 9) = C_{12,9}.(0.75)^{9}.(0.25)^{3} = 0.2581$

b. If you call 20 times, what is the probability that at least 16 calls are answered in less than 30 seconds? Round your answer to four decimal places (e.g. 98.7654).

This is $P(X \geq 16)$ when $n = 20$