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Aleonysh [2.5K]
2 years ago
5

What expressions is equivalent to -19.2 - (-3.8)

Mathematics
1 answer:
madam [21]2 years ago
4 0

Answer:

-19.2

Step-by-step explanation:

PLEASE MARK ME AS BRAINLIEST

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miv72 [106K]
You should put each question somewhere different so anyone can answer it and see it faster
3 0
3 years ago
Someone please help me I’ll give out brainliest please don’t answer if you don’t know
natita [175]

Answer:

$14.77

Step-by-step explanation:

5 0
2 years ago
Let z denote a random variable that has a standard normal distribution. Determine each of the probabilities below. (Round all an
Lorico [155]

Answer:

P(Z < 2.37) = 0.9911.

Step-by-step explanation:

We are given that Let z denote a random variable that has a standard normal distribution.

Let Z = a random variable

So, Z ~ Standard Normal(0, 1)

As we know that the standard normal distribution has a mean of 0 and variance equal to 1.

                          Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = mean = 0

           \sigma = standard deviation = 1

Now, the probability that z has a value less than 2.37 is given by = P(Z < 2.37)

        P(Z < 2.37) = P(Z < \frac{2.37-0}{1} ) = P(Z < 2.37) = 0.9911

The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.9911.

4 0
3 years ago
13. Ruby deposited $1,200 in an account that pays 5% in simple interest.
Lemur [1.5K]

Answer:

The answer is $480

Step-by-step explanation:

1,200 multiplied by 5% = 60 and 60 multiplied by 8 = 480

5 0
2 years ago
Find the average rate of change of f ( x ) = 7x^2 − 6 on the interval [ 3 , a ] . Your answer will be an expression involving a
slega [8]

Answer:

\frac{7a^2-63}{a-3}

Step-by-step explanation:

So what is the average rate of change?  Basically, it's the slope.  In fact it's exactly the slope for a linear equation, but how do you find slope?

\frac{y_2-y_1}{x_2-x_1}

Sp we just plug the values in.  

x_1=3\\x_2=a\\y_1=7(3)^2-6=63-6=57\\y_2=7(a)^2-6

\frac{7a^2-6-57}{a-3}=\frac{7a^2-63}{a-3}

3 0
3 years ago
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