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ivann1987 [24]
2 years ago
14

Is 7/9 a rational number ?

Mathematics
1 answer:
zzz [600]2 years ago
8 0

Answer:

Yes.

Step-by-step explanation:

Rational numbers can be represented as fractions with integers. The denominator must not equal 0.

\frac{7}{9} is already in this form. This means that it's a rational number.

Hope this helps.

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Solve <br>-25 = -3x + 2<br>4x - 2 = 18<br>3- 6x + 5 + 10x - 1<br>​
AlekseyPX

Answer:

Ok, so if the top line (-25 = -3x + 2) is separate and the second line is separate (4x - 2 = 18) then the answer is x = 9 and  x = 5

Step-by-step explanation:

Can you please elaborate on what the equations are? I will still answer the question.

7 0
3 years ago
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Whats the y intercept and the rate of change please help me
GenaCL600 [577]
Y-intercept= 5
Rate of change= 3
6 0
2 years ago
SOMEONE PLEASE HELP ME
soldier1979 [14.2K]
<h2>The power of 5 is 9, which is an odd number. Therefore, it is not a square number or a perfect square.</h2>

8 0
3 years ago
Consider the two triangles.
gizmo_the_mogwai [7]

Answer:

Show that the ratios StartFraction UV/XY, WU/ZX, and WV/ZY are equivalent.

Step-by-step explanation:

I just took the quiz and got it right. Hope this helps :)

5 0
3 years ago
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The Wall Street Journal recently ran an article indicating differences in perception of sexual harassment on the job between men
Komok [63]

Answer:

Critical value: b. 2.33

As the test statistic z=7.17 is greater than the critical value, it falls in the rejection region.

The null hypothesis is rejected.

There is enough evidence to support the claim that the proportion of women who think sexual harassment is a major problem in the American workplace is significantly higher than the proportion of men.

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that the proportion of women who think sexual harassment is a major problem in the American workplace is significantly higher than the proportion of men.

Then, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2> 0

The significance level is 0.01.

The sample 1 (women), of size n1=150 has a proportion of p1=0.62.

The sample 2 (men), of size n2=200 has a proportion of p2=0.24.

 

The difference between proportions is (p1-p2)=0.38.

p_d=p_1-p_2=0.62-0.24=0.38

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{93+48}{150+200}=\dfrac{141}{350}=0.403

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.403*0.597}{150}+\dfrac{0.403*0.597}{200}}\\\\\\s_{p1-p2}=\sqrt{0.001604+0.001203}=\sqrt{0.002807}=0.053

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{0.38-0}{0.053}=\dfrac{0.38}{0.053}=7.17

The critical value for a right-tailed test with a signficance level of 0.01 is zc=2.33 (see picture attached).

As the test statistic z=7.17 is greater than the critical value, it falls in the rejection region.

The null hypothesis is rejected.

There is enough evidence to support the claim that the proportion of women who think sexual harassment is a major problem in the American workplace is significantly higher than the proportion of men.

6 0
3 years ago
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