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3 years ago

Which situation has a result of 0?

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

7 0

Answer:

Step-by-step explanation:

24.75+(-24.75)= 0

Though I would have believed A would be correct if not for the fact of how far he walked which would be 4.6 miles

B is similar you can't become the same age as someone if the are older than you

D is just 230+230=460

FromTheMoon [43]3 years ago

4 0

Answer:

Step-by-step explanation:

Hope this helps!!!!!!!

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Solve the system of linear equations for x and y.(cos θ)x + (sin θ)y=1(−sin θ)x + (cos θ)y = 0x=y=

lys-0071 [83]

Answer:

$\bold{x =cos\theta}\\\bold{y=sin\theta}$

Step-by-step explanation:

The given system of linear equations is:

$(cos\theta)x+(sin\theta)y=1\\(-sin\theta)x+(cos\theta)y=0$

We have to solve the equations for the values of $x, y$ .

Let us use elimination method in which we eliminate one of the variables from the two variables.

For this, let us multiply the first equation by $sin\theta$ and second equation by $cos\theta$

Now, the equations become:

$(cos\theta.sin\theta)x+(sin\theta.sin\theta)y=sin\theta\\\Rightarrow (cos\theta.sin\theta)x+(sin^2\theta)y=sin\theta ....... (1)\\\\(-sin\theta.cos\theta)x+(cos\theta.cos\theta)y=0\\\Rightarrow (-sin\theta.cos\theta)x+(cos^2\theta)y=0 ..... (2)$

Now, let us add (1) and (2):

$(sin^2\theta)y+(cos^2\theta)y=sin\theta\\\Rightarrow (sin^2\theta+cos^2\theta)y=sin\theta\\\Rightarrow (1)y=sin\theta\\\Rightarrow y = sin\theta$

Using the equation:

$(-sin\theta)x+(cos\theta)y=0$

Putting value of $y$ :

$\Rightarrow (-sin\theta)x+(cos\theta)sin\theta=0\\\Rightarrow (sin\theta)x=(cos\theta)sin\theta\\\Rightarrow x = cos\theta$

So, the answer to the system of linear equations is:

$\bold{x =cos\theta}\\\bold{y=sin\theta}$

7 0

3 years ago

A city has designed a survey to collect information about residents’ opinions about city services. Which of the following descri

Maslowich

Bias refers to scenarios which might affect the ability of a statistical experiment to generalize, hence affecting the validity of research. Non-response bias occurs when majority of subjects fail to respond during a survey. Hence, a likely scenario is ; surveys were mailed to 500 people, and 200 of the surveys were completed and returned.

Non - response bias has to do with a situation whereby a large percentage of the selected samples from a population do not respond or fail to participate in the experiment or survey.

If 200 surveys were returned, then 300 of the sample participants did not respond. Which means 60% of the sample are non-responsive.

Therefore, a scenario where surveys were mailed to 500 people, and 200 of the surveys were completed and returned exemplifies a non - response bias.

Learn more :brainly.com/question/18405415

6 0

3 years ago

Jessica rode 9 miles farther than Roger rode. Let r represent the number of miles Roger rode . Write am expression for the numbe

ikadub [295]

R + 9
Expression would be r+9=j
J represents the miles that Jessica rode. Since Jessica rode 9 miles farther, you must add 9 to the amount that roger rode.

4 0

4 years ago

Read 2 more answers

sam owns $12,000 in loans for college , the interest rate is 8.25% and the loan will be paid off over 6 years . How much will he

diamong [38]

Answer:

If the interest rate is 8.25% each month then it would be $193,440 in total.

5 0

4 years ago

50 divided by 4= what

Igoryamba

12.5.........................................

8 0

3 years ago