Help pls max points or brainlest pls

Mathematics

2 answers:

ValentinkaMS [17]2 years ago

7 0

Answer:

Step-by-step explanation:

That would be the closet answer please mark as brainlist

eimsori [14]2 years ago

5 0

Answer is B

The rule for 90 degree clockwise rotation is that (x,y) changes to (-y,x).

So M(3,4) —> M’(-4,3)

You might be interested in

Six times the number of cattle less 87 is 999

AveGali [126]

You have to translate the statement into a mathematical expression...

Six times the number of cattle, if we let c be the number of cattle is:

6c

Less 87 means to subtract 87 so

6c-87

is 999 means

=999

so all together we have:

6c-87=999 now we need to isolate the variable by itself on one side of the equal sign....

6c-87=999 add 87 to both sides

6c=1086 divide both sides by 6

c=181

So there are 181 cattle.

8 0

3 years ago

All real numbers that are greater than or equal to -4 and less than 2.

Oxana [17]

DHJBDVSFIUGWEIUWEIURG F4GIUFGICUSIVGERG834Y83REDSNCJHHBBHN

3 0

3 years ago

A random sample of 130 students is chosen from a population of 4,500 students. The mean IQ in the sample is 120, with a standard

barxatty [35]

Answer:

$120-2.614\frac{5}{\sqrt{130}}=118.85$

$120+2.614\frac{5}{\sqrt{130}}=121.15$

Step-by-step explanation:

Information given

$\bar X= 120$ represent the sample mean

$\mu$ population mean (variable of interest)

s=5 represent the sample standard deviation

n=130 represent the sample size

For this case we can't set a margin of error just with a % since they not specify 1.13% respect to something for this case we can omit this value

Confidence interval

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

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

The degrees of freedom are given by:

$df=n-1=130-1=129$

The Confidence level is 0.99 or 99%, the significance would be $\alpha=0.01$ and $\alpha/2 =0.005$ , and the critical value would be $t_{\alpha/2}=2.614$