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Can some one please help me

saw5 [17]

Basically, all you have to do is substitue the terms given at the top.

x = -3

y = 6

z = -4

The first one will be set up like this:

(-3) + 6 + (-1) = 2

The second one will be set up like this:

-15 + (- -3) + 6 = -6

The third one will be set up like this:

3(-3) - 2(6) + (-4) = -25

The fourth one will be set up like this:

2(-4) - 3 (6) + 4(-3) = -38

The fifth one will be set up like this:

3 ( -3) + 2 (6) + (-4) = -1

The sixth will be set up like this:

(-3)(-4)

---------- = -1

-2 (6)

The seventh will be set up like this:

2 (6) (-4) - 3 (-3) = -39

Hope this helps! Have a good day/night! c:

6 0

3 years ago

√70 is between which two numbers on the number line?

Leto [7]

Answer:

C) 8 and 9

Step-by-step explanation:

We know that 70 is between two perfect squares.

The square numbers 64 and 81 can help us solve this question.

64<70<81

We take square root to get:

$\sqrt{64} \: < \: \sqrt{70} < \sqrt{81}$

We simplify this to get:

$8 \: < \: \sqrt{70} \: < \: 9$

Therefore √70 is between 8 and 9.

The correct option is C.

6 0

3 years ago

The circumference of a circle is 47.1 and the diameter of the circle is 15. Which best represents the value of π? 47.1/15 7.54/7

Vlad1618 [11]

Answer: 47.1/15

Step-by-step explanation:

We define Circumference by C= pie X D[diameter]

Hence pie= C/ D= 47.1/15

3 0

3 years ago

Number of passengers who arrive at the platform in an Amtrack train station for the 2 pm train on a Saturday is a random variabl

Svetradugi [14.3K]

Answer:

$P(80$

And we can find this probability with this difference:

$P(-4$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(-4$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the number of passengers who arrive at the platform of a population, and for this case we know the following info

Where $\mu=180$ and $\sigma=25$