What's the numerator for the following rational<br> expression? x/y+ 7/y = ?/y

Explain why all squares are similar????? and please help with question below!!!!!!!!!!!!!

Oliga [24]

That's not a squre
anyway, we use ratios
base:person to corner=28:8
height to height=x:5
so
28/8=x/5 becasue same ratio
28/8=14/4=7/2
7/2=x/5
multiply
35/10=2x/10
35=2x
divide 2
17.5=x

x=17.5 feet

5 0

3 years ago

HELP HELP HALP HELP HELP

RUDIKE [14]

C it’s what I chose for it

6 0

2 years ago

The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. Two random samples from

Vinvika [58]

Answer:

$t=\frac{(810-770)-0}{\sqrt{\frac{67^2}{13}+\frac{56^2}{19}}}}=1.771$

$df=n_1 +n_2 -2=13+19-2=30$

Since is a right tailed test the p value would be:

$p_v =P(t_{30}>1.771)=0.0434$

Comparing the p value with the significance level $\alpha=0.05$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and the mean for group 1 is significantly higher than the mean for the group 2

Step-by-step explanation:

Data given

$\bar X_{1}=810$ represent the mean for sample 1

$\bar X_{2}=770$ represent the mean for sample 2

$s_{1}=67$ represent the sample standard deviation for 1

$s_{2}=56$ represent the sample standard deviation for 2

$n_{1}=13$ sample size for the group 2

$n_{2}=19$ sample size for the group 2

$\alpha=0.05$ Significance level provided

t would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the mean for category 1 is higher than the mean for category 2, the system of hypothesis would be:

Null hypothesis: $\mu_{1}-\mu_{2}\leq 0$

Alternative hypothesis: $\mu_{1} - \mu_{2}> 0$

We don't have the population standard deviation's, so for this case is better apply a t test to compare means, and the statistic is given by:

$t=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

And the degrees of freedom are given by $df=n_1 +n_2 -2=13+19-2=30$

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

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

$t=\frac{(810-770)-0}{\sqrt{\frac{67^2}{13}+\frac{56^2}{19}}}}=1.771$

P value

Since is a right tailed test the p value would be:

$p_v =P(t_{30}>1.771)=0.0434$

Comparing the p value with the significance level $\alpha=0.05$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and the mean for group 1 is significantly higher than the mean for the group 2

4 0

3 years ago

Erin has 5 cookies, and Adlynn has 8. If Mallory has half the number of cookies as Adlynn, how many

Dimas [21]

Answer:

17

Step-by-step explanation:

8*2=4

4+8+5= 17

4 0

2 years ago

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**I WILL GIVE BRAINLIEST TO THE PERSON WHO CAN HELP ME/AND 40 POINTS**

Mama L [17]

Tank calculations :

Volume = 1/4(4/3 * pi * r^3)

r= 70 feet.

Volume = 1/4(4/3 * 3.14 * 70^3)

Calculating the values:

Volume = 359,000.67 ft.cubed

No we divide the actual radius by 6 to get the volume of scale model.

Hence,

6^3 = 216 times smaller.

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│Hope this helped _____________________│

│~Derelis ____________________________ │

╨___________________________________╨

3 0

3 years ago

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What's the numerator for the following rational expression? x/y+ 7/y = ?/y