Determine which of the graphs represent the proportional relationships. Circle the appropriate response.

Which mathematical property is demonstrated? if x= -3 and -3 =z,then x=z

Vladimir79 [104]

Basic Properties of Real Numbers:

Given that X, Y, Z, A, B, C, and D are real numbers, then the following are true:

Commutative Property of Addition: X+Y = Y+X

Commutative Property of Multiplication: XY = YX

Associative Property of Addition: (X+Y) + Z = X + (Y + Z)

Associative Property of Multiplication: ( X Y ) Z = X ( Y Z )

Additive Identity: For any real number X, X+0 = X where 0 is the additive identity

Additive Inverse: For any real number X, there exists -X such that X+(-X) = 0

Multiplicative Identity: For any real number X, 1●X = X where 1 is the multiplicative identity

Multiplicative Inverse: For any real number X where X≠0, there exists 1/X such that X ●(1/X) = 1

Zero Product Law: If XY = 0, then X=0 or Y=0 or both X and Y = 0

5 0

3 years ago

The three-dimensional shape that this net represents is a _?

Klio2033 [76]

Answer:

Step-by-step explanation:

It’s a cube with edge length of 12 cm.

The cube has six faces, and the are ma if each face is 144 cm²

Total surface area = 6×144 = 864 cm²

4 0

3 years ago

Find the limit of the function algebraically. limit as x approaches zero of quantity negative six plus x divided by x to the fou

arlik [135]

(-6 + x) 1 6
-------- = --- - --
x^3 x^4
x^4

as x ---> 0 limit f(x) = - ∞

5 0

3 years ago

Read 2 more answers

I’ll give brainliest, I need help with 9 and 10

Harlamova29_29 [7]

9. 7a^2 + 5ab - 2b^2
10. m^3n - 3m^2n^2 + 8mn^3
the trick is to go from smallest to biggest

6 0

3 years ago

Read 2 more answers

in a study of speed dating, male subjects were asked to rate the attractiveness of their female dates, and a sample of the res

Rudik [331]

Answer:

$7-1.796\frac{2.216}{\sqrt{12}}=5.851$

$7+1.796\frac{2.216}{\sqrt{12}}=8.149$

So on this case the 90% confidence interval would be given by (5.851;8.149)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

Data: 7 8 2 10 6 5 7 8 8 9 5 9

In order to calculate the mean and the sample deviation we can use the following formulas:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

$s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}$ (3)

The mean calculated for this case is $\bar X=7$

The sample deviation calculated $s=2.216$

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=12-1=11$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,11)".And we see that $t_{\alpha/2}=1.796$

Now we have everything in order to replace into formula (1):

$7-1.796\frac{2.216}{\sqrt{12}}=5.851$

$7+1.796\frac{2.216}{\sqrt{12}}=8.149$

So on this case the 90% confidence interval would be given by (5.851;8.149)

3 0

3 years ago