# Dan

### Looking for a particular PC keyboard?

Currently I have a logitech k300 compact keyboard. It measures approx 40cm long. Does anyone know of any makes that are similar in length but have illuminated keys?

I've looked at all of the gaming keyboards which have backlit keys but they are all long (standard size I suppose).

1 AnswerOther - Hardware2 months ago### Face masks and allergies?

I have non-allergic rhinitis, so my nose is blocked 90% of the time so I tend to breath through my mouth the majority of the time.

In Wales from Monday 14 Sept, everyone has to wear masks in public indoor spaces, just like England introduced a while back. The store I work in has given everybody masks to wear from Monday, but they feel thick fabric..I haven't tried it on yet but I feel that it's going to be horrible to wear.

How are some people exempt from wearing them, example asthma sufferers (I'm no expert, but apparently it doesn't affect a persons breathing) but I think it does.

What are your thoughts on this?

10 AnswersOther - General Health Care3 months ago### How to calculate this equation?

If I have the following equation: if

y

is the global population in billions at the start of year and

t

is the year.

300y = 23t - 44180 (1950 ≤ t ≤ 2010)How, using algebra can I solve the equation to calculate when the population passes 6billion?So far I have:

300y = 23t - 44180

300x6 = 23t - 44180

1800 + 44180 = 23t

45980 = 23t

but not sure if any of what I have is even remotely correct.

Best answer for clear concise help. Thank you!

2 AnswersMathematics3 months ago### Solve this equation by factorisation?

I've been on an online calculator to see how this is calculated but I don't understand it.

The equation is:

2x^2 + 30x + 112 = 0

Can't work out how to solve this by factorisation.

Steps and solutions would be great, thank you!

4 AnswersMathematics3 months ago### Graph question help please?

If I have an equation of a line y = -2x + 4

How do I find if the point (-5.5, -6.5) lie on the line? if yes/no, then why?

I've plotted the equation into the graph but struggling with it.

Thanks.

2 AnswersMathematics3 months ago### Graph equation help?

If a line passes through the points on a graph: (-2,8) and (4-4)

What is the gradient of the line

and what is the equation of this line?

I calculated the gradient as -2

Thanks.

3 AnswersMathematics3 months ago### Anyone else experience cold calls?

I've had the same mobile number for about 15 years now and more than ever I am getting ridiculous amounts of marketing calls, car accident calls, life insurance calls etc.

I signed up to the TPS about 6 months ago and hasn't seem to have made a difference. These so called 'companies' have gone from landlines to calling you off what seems to be mobile numbers. If you try and call back it says the number is not recognised.

Just this week I've had 5 calls from Perfect Benefits to ask marketing questions, each time I've said I'm not interested and take my number off your system. Each of these times they have called off a different number starting with 07.

If I had time I used to give stupid answers to their questions but now it's getting on my nerves. Actually surprised I haven't received a call today.

How often do you get such calls?

5 AnswersPolls & Surveys3 months ago### Degrees to radian to radian pi?

I wan't to convert 105 degree to radians, then display my answer in terms of pi.

so, I've done 105Xpi/180=1.832595715 rad

I've been on a converter to show what 105 degree is in terms of pi and it says 7/12 pi

But don;t know how to get to that value?

4 AnswersMathematics3 months ago### Geometry question help please?

If a triangle

DEF

has a right angle at

E.

The length of side

DE

is 7.1km and length of side

EF

is 1.6km. What is the ∠

EDF?

If possible could you supply a rough sketch of the triangle to help me undertand this a bit better?Thank you.

6 AnswersMathematics4 months ago### Python Lists?

I want to add numbers together in a list.

I need to print the values of the first number in the list plus the last number in the list, so the first sum would be 999+1 and print function would display 1000

and the print function for the second list would display 10.

I can't seem to define the print_plus_last. I can either get the print function to display only one number from the listsnew_list = [1, 2, 3, 5, 33, 56, 199, 353, 530, 999]new_list = [0, 2, 4, 10]print (first_plus_last)

Can anyone help?

Thanks

1 AnswerProgramming & Design5 months ago### Writing this equation in steps?

I need to write/work out the following equation step by step to get the answer at the end of the equation:

s=12((2)(4)+(12-1)(5))/2

I get the answer 378 when I plug the equation into the calculator, but I need to show it in steps like:

=12-1

=11

=11x5

=55

=....

=....

=378

Can you help me put this into steps please?

Thanks

8 AnswersMathematics5 months ago### Can you help with this algebraic equation please?

How to solve this formula for S.

S=n(2a+(n-1)d)/2

where:

a=4

d=5

n=12

Best answer for clear steps.

Thank you.

2 AnswersHigher Education (University +)5 months ago### Do you consume energy drinks?

Do you consume energy drinks?

24 AnswersNon-Alcoholic Drinks5 months ago### Is this equation correct?

finding the x-intercept.

y=(2/5)x-19/5

0=(2/5)x-19/5

19/5=2/5x

19/2,0 = x-intercept

1 AnswerMathematics6 months ago### How do I find the equation of the line?

I need to find the equation of the line that passes through the points (1,-2) with a slope of 2/5

x=1

y=-2

m=2/5

I need to show full workings but can't quite get it right to find the correct equation of the line.

Can anyone help me with the workings out in detail so I can practice with more of these questions?

Thanks

2 AnswersMathematics6 months ago### How to fix my display on new pc monitor as the display seems not quite right?

I ve just bought a new 4k hd pc monitor.

I ve set the resolution at 3840x2160 and the scale of apps, text etc at 250 percent as this is the only way the text on my screen is readable.

When I right-click and drag a file for example into another folder, the move to little text box that comes up is tiny. This obviously has something to do with the scaling.

I ve got the monitor connected via HDMI cable into my pc s graphics card.

Is this the best display I m going to get?

1 AnswerMonitors7 months ago### Help with maths question?

k=a - (3b+c)^2

a=1.4

b= -0.7

c= 0.5

How can I find the value of k ?

Unsure of what order to do the workings out.

Thank You

4 AnswersMathematics9 months ago### Writing a formula help?

If a ticket price for adults is £15 and children is £10

a=£15

c=£10

how do I write my own formula to find the total cost (t)? If Two adults and three children want tickets?

I tried: t= ax2 + cx3 but I don't think that's right.

Thanks

2 AnswersMathematics9 months ago### Help with another maths question?

I needed to convert a sinewave 475Hz to milliseconds which I've managed to do.

So if I have 2.11ms (3 s.f) which is now reduced by a factor of 5, which is 0.422ms.

So, if the time period is now 0.422ms, how do I now calculate the resulting frequency of the sinewave in kHz to 3 significant figures?

I've found a calculator online and the result in kHz I got was 0.422ms = 2.36966825 kHz but I need to know how it was calculated.

Thanks!!

1 AnswerMathematics10 months ago### Can someone help me with this equation?

Find the value of b^2-4ac

when a = −1, b = −17 and c = 21.

And possibly some steps/tips on how to work it out?

Thanks

4 AnswersMathematics10 months ago