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2 years ago

Which value of x is a solution to the open sentence?

Mathematics

1 answer:

kati45 [8]2 years ago

3 0

5X -3X > 4

2X > 4

X > 2

the only viable answer is D

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There is a circular fountain with a diameter of 16 feet. There is a walkway that is 3 feet wide that goes around it. What is the

Sergio039 [100]

Answer:

82.47

Step-by-step explanation:

area of fountain: 201.06(see photo 1)

area of fountain and walkway:283.53(see photo 2)

area of walkway:82.47(subtract fountain area from fountain and walkway)

7 0

2 years ago

verifica care dintre urmatoarele numere sunt cuburi perfecte:2 la puterea a 8, 27, 64, 5 la puterea 48, si 7 la puterea 225

4vir4ik [10]

Answer:

Step-by-step explanation:

8,27,64,548, it is 355

6 0

2 years ago

A researcher compares the effectiveness of two different instructional methods for teaching electronics. A sample of 138 student

yan [13]

Answer:

The 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the difference between population means is:

$CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}$

The information provided is as follows:

$n_{1}= 138\\n_{2}=156\\\bar x_{1}=61\\\bar x_{2}=64.6\\\sigma_{1}=18.53\\\sigma_{2}=13.43$

The critical value of <em>z</em> for 98% confidence level is,

$z_{\alpha/2}=z_{0.02/2}=2.326$

Compute the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 as follows:

$CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}$

$=(61-64.6)\pm 2.326\times\sqrt{\frac{(18.53)^{2}}{138}+\frac{(13.43)^{2}}{156}}\\\\=-3.6\pm 4.4404\\\\=(-8.0404, 0.8404)\\\\\approx (-8.04, 0.84)$

Thus, the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).

5 0

2 years ago

Solve 6 < x + 5 < 11

Vanyuwa [196]

Answer:

I think it should be 1 < x ≤ 6

Step-by-step explanation:

7 0

2 years ago

Can someone plz help me with this one problem plz!!!

maksim [4K]

answer is d or c because when u find Mean u add all numbers the. divide and median is middle number

Step-by-step explanation:

mean us 7.5 median is 6 asssss

7 0

2 years ago