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3 years ago

Slope is 2

Mathematics

2 answers:

kogti [31]3 years ago

7 0

Answer:

what

Step-by-step explanation:

professor190 [17]3 years ago

7 0

Answer:

do you need help???

Step-by-step explanation:

You might be interested in

Thrice the sum of three fifths and two thirds less one half is what number?

Oduvanchick [21]

Answer:

Step-by-step explanation:

Thrice the sum of three fifths and two thirds less one half is expressed as 3(3/5 + 2/3)-1/2

Open the parenthesis

3(3/5) + 3(2/3) - 1/2

= 9/5 + 6/3 - 1/2

Find LCM

= 9(6)+10(6)-15/30

= 54+60-15/30

= 54+45/30

= 99/30

= 3 9/30

= 3 3/10

Hence the number id 3 3/10

4 0

3 years ago

Will give crown help

jasenka [17]

Answer:

D is a right angle

B is an accute angle

A and C are obtuse

4 0

3 years ago

You are given the following information obtained from a random sample of 5 observations. 20 18 17 22 18 At 90% confidence, you w

Margaret [11]

Answer:

The null hypothesis is

$H_o : \mu = 21$

The Alternative hypothesis is

$H_a : \mu< 21$

$\sigma_{\= x} = 0.8944$

$t = -2.236$

Yes the mean population is significantly less than 21.

Step-by-step explanation:

From the question we are given

a set of data

20 18 17 22 18

The confidence level is 90%

The sample size is n = 5

Generally the mean of the sample is mathematically evaluated as

$\= x = \frac{20 + 18 + 17 + 22 + 18}{5}$

$\= x = 19$

The standard deviation is evaluated as

$\sigma = \sqrt{ \frac{\sum (x_i - \= x)^2}{n} }$

$\sigma = \sqrt{ \frac{ ( 20- 19 )^2 + ( 18- 19 )^2 +( 17- 19 )^2 +( 22- 19 )^2 +( 18- 19 )^2 }{5} }$

$\sigma = 2$

Now the confidence level is given as 90 % hence the level of significance can be evaluated as

$\alpha = 100 - 90$

$\alpha = 10$ %

$\alpha =0.10$

Now the null hypothesis is

$H_o : \mu = 21$

the Alternative hypothesis is

$H_a : \mu< 21$

The standard error of mean is mathematically evaluated as

$\sigma_{\= x} = \frac{\sigma}{ \sqrt{n} }$

substituting values

$\sigma_{\= x} = \frac{2}{ \sqrt{5 } }$

$\sigma_{\= x} = 0.8944$

The test statistic is evaluated as

$t = \frac{\= x - \mu }{ \frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{ 19 - 21 }{ 0.8944 }$

$t = -2.236$

The critical value of the level of significance is obtained from the critical value table for z values as

$z_{0.10} = 1.28$

Looking at the obtained value we see that $z_{0.10}$ is greater than the test statistics value so the null hypothesis is rejected

6 0

3 years ago

The cost of 2 ounces of pure gold was $2,640. How much did it cost for 1 ounce of pure gold?

sergeinik [125]

Answer:

$1,320

Step-by-step explanation:

First you divide $2.640 with 2 and tah da

5 0

3 years ago

A student solved log4(2x – 12) = 3, as shown.

ohaa [14]

Answer:

x = -6

Step-by-step explanation:

you want to solve the aswer so you wanna solve for whats in the parenthesis so your new equation should look like this:

8x + 48 = 3

you want to subtract 48 from both sides your new equation should look like this:

8x = -45

now you want to get x by itself and your new equation should be:

x = -6

6 0

2 years ago