Can someone please answer questions 1 -5

Mathematics

2 answers:

Aloiza [94]3 years ago

8 0

The answer is 19
I think soo

larisa [96]3 years ago

4 0

1. Algebraic expression, it consists of a number and a variable

2. The number of times Chris washes the car

3. 28

4. 85

5. 23.9

You might be interested in

A line passes through points at (4, 4) and (-3,-2). What is its slope?

nadya68 [22]

Answer: m=6/7

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Find the Gcf of 28 and 42

Oksana_A [137]

28 = 2 * 2 * 7

and

42 = 2 * 3 * 7

GCF = 2 * 7 = 14

4 0

3 years ago

In randomly generated list of numbers from 0 to 4, the chance that each

Alex_Xolod [135]

False, there are 5 possible outcomes
0
1
2
3
4
So the chance of each number is 1/5 or 20%

4 0

3 years ago

Read 2 more answers

A signal in a communication channel is detected when the voltage is higher than 1.5 volts in absolute value. Assume that the vol

saw5 [17]

Answer:

The standard deviation of the voltage is $\sigma = 0.91$

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by

$Z = \frac{X - \mu}{\sigma}$

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

The problem states that

Assume that the voltage is normally distributed with a mean of 0, so $\mu = 0$

A signal in a communication channel is detected when the voltage is higher than 1.5 volts in absolute value. What is the standard deviation of voltage such that the probability of a false signal is 0.05?

We know that $P(X>1.5) = 0.05$ . This means that when $X = 1.5$ the zscore has a pvalue of 0.95. Looking at the zscore table, we have that $Z = 1.65$ . So