Who can ask me a question about addition?

Please help! Please explain and actually help!

stealth61 [152]

Answer:

17

Step-by-step explanation:

According to the Pythagorean theorem, $a^2+b^2=c^2$ , where a and b are the two legs of a right triangle, and c is the hypotenuse. In this scenario, the two legs are 8 and 15, and we are asked to find the hypotenuse. Plugging the two values in, we have $64+225=c^2$ , where 64 is 8 squared and 225 is 15 squared. Adding, we have the two values as 289. If you don't know your squares, I suggest you take a look at a list or even memorize your squares until 30, but 289 is actually 17 squared. If $c^2=289$ , then c = $\sqrt{289}$ , which is 17.

7 0

3 years ago

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A store gives a discount of $20 for every purchase above 100. A customer buys clothes worth $78.04, groceries worth &24.81 a

Nadya [2.5K]

First figure out his total bill by adding up what he buys.

$\sf 78.04+24.81+17.96=\$120.81$

Now subtract the discount of $20 since his purchase was above $100:

$\sf 120.81-20=\boxed{\sf\$100.81}$

7 0

3 years ago

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Plz help 5th grade work

SSSSS [86.1K]

Answer:

81 , 24 AND 108

Step-by-step explanation:

5 0

3 years ago

Math-geometry 9th grade I rlly need help with this finding x

Naya [18.7K]

Answer:

1)x=11

2)x=9

Step-by-step explanation:

In the picture

5 0

3 years ago

Minor surgery on horses under field conditions requires a reliable short-term anesthetic producing good muscle relaxation, minim

andreev551 [17]

Answer:

$p_v =P(t_{74}$

If we compare the p value and a significance level for example $\alpha=0.1$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the true mean it's not significantly less than 20 min.

Step-by-step explanation:

Data given and notation

$\bar X=18.81$ represent the average lateral recumbency for the sample

$s=8.4$ represent the sample standard deviation

$n=75$ sample size

$\mu_o =20$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to apply a left tailed test.

What are H0 and Ha for this study?

Null hypothesis: $\mu \geq 20$

Alternative hypothesis : $\mu < 20$

Compute the test statistic

The statistic for this case is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{18.81-20}{\frac{8.4}{\sqrt{75}}}=-1.227$

The degrees of freedom are given by:

$df=n-1=75-1=74$

Give the appropriate conclusion for the test

Since is a one side left tailed test the p value would be:

$p_v =P(t_{74}$

Conclusion

If we compare the p value and a significance level for example $\alpha=0.1$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the true mean it's not significantly less than 20 min.

3 0

3 years ago