An Old Guy Does Maths

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Untangle this formula and substitute values to find the interest rate.

Untangle this formula and substitute values to find the interest rate.

An Old Guy Does Maths

1 views·2 days ago

Find the values of 'x'&'y' in terms of 'a,b&c'.

Find the values of 'x'&'y' in terms of 'a,b&c'.

An Old Guy Does Maths

1 views·1 month ago

Find the measurements of the blue shape and the equations of the lines that form its borders.

Find the measurements of the blue shape and the equations of the lines that form its borders.

An Old Guy Does Maths

1 views·1 month ago

How to calculate a sample standard deviation.

How to calculate a sample standard deviation.

An Old Guy Does Maths

10 views·1 month ago

Find the values of 'b' and 'c' in this quadratic given the clues P(1)=2 & P(-1)=6.

Find the values of 'b' and 'c' in this quadratic given the clues P(1)=2 & P(-1)=6.

An Old Guy Does Maths

14 views·2 months ago

Find x and y in terms of a.

Find x and y in terms of a.

An Old Guy Does Maths

7 views·2 months ago

How to find the angle between two vectors.

How to find the angle between two vectors.

An Old Guy Does Maths

6 views·2 months ago

Binomial probability - a worked example.

Binomial probability - a worked example.

An Old Guy Does Maths

8 views·2 months ago

Finding the Mean and Standard Deviation of a discrete random variable.

Finding the Mean and Standard Deviation of a discrete random variable.

An Old Guy Does Maths

11 views·4 months ago

Finding the determinant of a 3x3 matrix

Finding the determinant of a 3x3 matrix

An Old Guy Does Maths

7 views·4 months ago

Find the domain of this function.

Find the domain of this function.

An Old Guy Does Maths

9 views·5 months ago

Calculate the definite integral of this function.

Calculate the definite integral of this function.

An Old Guy Does Maths

6 views·5 months ago

Finding solutions for Sine and Cosine in a quadratic equation.

Finding solutions for Sine and Cosine in a quadratic equation.

An Old Guy Does Maths

3 views·6 months ago

Find the length of the side CD.

Find the length of the side CD.

An Old Guy Does Maths

11 views·6 months ago

How to find a limit.

How to find a limit.

An Old Guy Does Maths

8 views·7 months ago

An x axis co ordinate & an intersection with a perpendicular line Find the equation of a line

An x axis co ordinate & an intersection with a perpendicular line Find the equation of a line

An Old Guy Does Maths

3 views·7 months ago

Anti differentiation when r= 1

Anti differentiation when r= 1

An Old Guy Does Maths

8 views·8 months ago

e raised to the power of 4x-7 = 8. What is the value of x

e raised to the power of 4x-7 = 8. What is the value of x

An Old Guy Does Maths

11 views·8 months ago

Try to find the perimeter of this shape.

Try to find the perimeter of this shape.

An Old Guy Does Maths

28 views·9 months ago

How to find key points for a log graph and find its inverse.

How to find key points for a log graph and find its inverse.

An Old Guy Does Maths

27 views·9 months ago

What does 'x' equal We are not looking for a number but an expression

What does 'x' equal We are not looking for a number but an expression

An Old Guy Does Maths

16 views·9 months ago

Cows and ducks in a field. How many of each

Cows and ducks in a field. How many of each

An Old Guy Does Maths

193 views·10 months ago

Complete the square

Complete the square

An Old Guy Does Maths

20 views·10 months ago

Simplify this expression

Simplify this expression

An Old Guy Does Maths

41 views·10 months ago

How do you simplify this expression

How do you simplify this expression

An Old Guy Does Maths

12 views·11 months ago

Find sides h,l and r, angle BCA and the area of triangle ABC.

Find sides h,l and r, angle BCA and the area of triangle ABC.

An Old Guy Does Maths

19 views·11 months ago

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An Old Guy Does Maths

10 views·11 months ago

Simplify and write as a single expression

Simplify and write as a single expression

An Old Guy Does Maths

19 views·11 months ago

Simplifying logs in the same base.

Simplifying logs in the same base.

An Old Guy Does Maths

17 views·1 year ago

Radians problem

Radians problem

An Old Guy Does Maths

29 views·1 year ago

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