All categories

3 years ago

If I add 9 to my number,I get 6.what is my number?

Mathematics

2 answers:

aleksley [76]3 years ago

7 0

You can set up the equation x+9=6. So the number will be -3

vovangra [49]3 years ago

7 0

-3, which the equation would be -3 + 9, which you would really subtract, so 9 - 3.

You might be interested in

3x + 4y = 24 => X+y=?

ikadub [295]

x + y = x / 4 + 6

because you divide them

8 0

3 years ago

A school authority claims that the average height of students is 178 cm. A researcher has taken a well-designed survey and his s

Hunter-Best [27]

Answer:

d) The difference exists due to chance since the test statistic is small

Step-by-step explanation:

From the given information:

Population mean = 178 cm

the sample mean = 177.5 cm

the standard deviation = 2

the sample size = 25

The null hypothesis and the alternative hypothesis can be computed as:

Null hypothesis:

$H_o: \mu = 178$

Alternative hypothesis:

$H_1: \mu \neq 178$

The t-test statistics is determined by using the formula:

$t = \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$t = \dfrac{177.5 - 178}{\dfrac{2}{\sqrt{25}}}$

$t = \dfrac{-0.5}{\dfrac{2}{5}}}$

$\mathbf{t= -1.25}$

Degree of freedom df = n- 1

Degree of freedom df = 25 - 1

Degree of freedom df = 24

At the level of significance ∝ = 0.05, the critical value = 2.064

Decision rule: To reject the null hypothesis if the test statistics is greater than the critical value at 0.05 level of significance

Conclusion: We fail to reject the null hypothesis since the test statistics is lesser than the critical value and we conclude that the difference exists due to chance since the test statistic is small

5 0

3 years ago

The positive acute angle formed by the _____ side of an angle in standard position and the x-axis is called a reference angle.

Helga [31]

Answer:

option-C

terminal

Step-by-step explanation:

We know that

reference angle is between terminal side and x-axis

so, the other side will be terminal position

so, we can write as

The positive acute angle formed by the <u>terminal</u> side of an angle in standard position and the x-axis is called a reference angle.

So,

option-C

terminal

7 0

3 years ago

CONVERT THE PERCENTAGES FRACTION 130%

Natasha2012 [34]

Answer:

13/10

Step-by-step explanation:

Its 13/10...

please give brainliest

4 0

3 years ago

Read 2 more answers

Please help me out :/

tensa zangetsu [6.8K]

Add up all of your X’s!! then Try and add up all of the degrees I think. Check me if i’m wrong !

7 0

3 years ago