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3 years ago

What is the equivalent ratio of 9 to 11

Mathematics

2 answers:

Zepler [3.9K]3 years ago

7 0

<span />If u times 2 you will get 18:22 which is equivalent to 9:11

<span>Next u could do 18:22 times 2 to get another equivalent answer to 9:11 </span>

<span /><span>You could just continue this to get more equivalent answer to 9:11</span>

<span>HOPE MINE IS THE BRAINLIEST </span>

maxonik [38]3 years ago

4 0

9:11

9x2 = 18
11x2=22

the answer will be 18:22

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Match the y coordinate with coo responding pairs of x

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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).

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3 years ago

Been stuck on this question for 20 minutes, can someone please help.

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I'm sorry m8 the only options I can give you is life or death. also can u give me brainliest many thank xoxo

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2 years ago

The length of RT is 4x-4.Given that point S is between point R and T,

Monica [59]

Answer:

RS = 32

Step-by-step explanation:

Set-up equation like this -- 2x+6+16=4x-4

Solve for x

Then plug x in for the length of RS. You should get 32 for RS.

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3 years ago

2) A product originally costs $125. If the product goes on sale for 20% off, and then goes on sale for an additional 30% off, wh

alukav5142 [94]

To do these, always convert the percents to decimals, so you can subtract it from 1. Remember, 1 is the whole. When you subtract the part that's taken off, you are left with what you have to pay. If you have 20% off of $100, then you are paying for 80% of $100. **of means to multiply** so you would multiply: 0.8X100, which would be $80.

First, multiply 125x0.8

Multiply that answer by 0.7

You should get B. $70

3) multiple 22.90x0.93

You should get D

7 0

3 years ago

Read 2 more answers