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Maths

Asked by Daddy

7+n

Your question seems to be incomplete, care to elaborate

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Samuel Osei-Wusu
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5.5k students helped

Maths

Asked by Ross

How do I do differential equations?

Initially, your equation will include dy/dx = (...) right? Inside the (...) will be an "x" term and a "y" term. For example: dy/dx = x/(1 + y). Rearrange that so your "y" term is with dy and your "x" term is with dx: (1+y) dy = x dx Integrate each side! y + (y^2/2) = x^2/2 + c ---> [the (+ c) only needs to be on one side, I prefer the left.] What you do from here depends on your question s... more

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Ibrahim Dangra
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810 students helped

Maths

Asked by Safiya

15% of a number is 42. What was the original number?

The answer is 280 Working out: 0.15x = 42 x = 42/0.15 x = 280

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Abdur Khan
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164 students helped

Maths

Asked by Faith

Possible formuna for the nth term of a sequence of 37 33 29 25 21

If we take 37 as the 0th term, then the nth term can be found as 37-4n, as each following number is smaller by a common difference of 4. For example: 4th term (21) = 37-4*4 = 37-16 = 21. If we consider 37 to be the 1st term, we need to make a small change to our formula: 37-4(n-1) Now: 5th term (21) = 37-4*(5-1) = 37-16 = 21.

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Paja Kruzikova
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473 students helped

Maths

Asked by Kayleigh

If £2000 is placed into a bank account that pays 3% compound interest per year, how much will be in the account after 5 years

Hi Kayleigh, You would need to use the compound interest formula here, which is Final amount = initial amount x interest rate^years. -- The initial and final amounts are both in pounds -- The interest rate is a percentage change displayed as a decimal (ie. a multiplier). For instance, if there was a 7% increase, it would be x1.07 because the next amount is the original amount (the '1') plus th... more

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Bhargavi D
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24 students helped

Maths

Asked by Ellie

How many minutes in 2 2/3 hours

In one hour, there are 60 minutes. In two hours, there has to be 60 x 2 minutes; so 120 minutes. To calculate 2/3 of an hour, you do 60 / 3 = 20 and then 20 x 2 to get 40 minutes. 120 + 40 = 160 minutes.

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Deleted Account
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80 students helped

Maths

Asked by Alicia

Make x the subject x-5y=3v

Hello Alicia, Hope you’re keeping well. Please find the below solution: Simplifying x + -5y = 3v Solving x + -5y = 3v Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5y' to each side of the equation. x + -5y + 5y = 3v + 5y Combine like terms: -5y + 5y = 0 x + 0 = 3v + 5y x = 3v + 5y Final solution: x = 3v + 5y Please feel free to get... more

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Karan Mahendra Jain
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2.5k students helped

Maths

Asked by Paula

V=u+at u=3 a=-2 t= 1/4

You need to substitute the algebra for their numeric values. So V = u + at becomes V = 3 + -2 x 1/4 Then, you must follow BIDMAS to solve the answer. Multiplication comes before addition, so you do -2 x 1/4 = -1/2 Then, you do the addition: V = 3 + -1/2 -> Plus and Minus results in a Minus, so: V = 3 - 1/2 = 2 1/2 ∴ V = 2 1/2

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Deleted Account
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