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A rectangle of perimeter 45cm has sides of length x and x+4. Work out the value of x.

First, draw a diagram to help visualise the problem.
Next, write out the full sum: x + x + (x+4) + (x+4) = 45
This simplifies to: 2x + 2(x+4) = 45
Which expands to: 2x + 2x + 8 =45
T...

Answered by Imogen R. • Maths tutor

6465 Views

Maltose is hydrolysed by the enzyme maltase. Explain why maltase catalyses only this reaction (3 marks)

The question is three marks, so should have three points.1) Active site of the enzyme has a specific shape/ tertiary structure/ complementary to maltose2) Only maltose can bind...

Answered by Amy W. • Biology tutor

2718 Views

Define an isotope.

Compounds with the same molecular formula but have different structural formulas.

Answered by Shivani S. • Chemistry tutor

2476 Views

When dealing with trigonometric functions such as sin, cos or tan, how do you solve the trigonometric equation when the argument of the function(s) is nx, where n is a real number not equal to 1.

In order to solve Trigonometric equations like these, you must consider how the argument of the function changes the period of the graph. There are many methods of solving equations like this, but persona...

Answered by Joshua M. • Maths tutor

2997 Views