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Factorise h^2 - 36.

Notice that 36 is a square number equivalent to 6 2 . Can also tell this as the expression contains no coefficients of h so they must cancel each other out. Using this information we can deduce that the fact...
EC
Answered by Ella C. • Maths tutor
3418 Views

Rearrange the following to make c the subject: 11a + 5c = d ( 6 + 2c )

Steps: (1) Multiply out the brackets on the left handside [11a + 5c = 6d + 2dc]. (2) Put all terms containing c on one side and all other terms on the other side of the equation [ 5c - 2dc = 6d - 11a]. (3) T...
JL
Answered by Jeremy L. • Maths tutor
4108 Views

Describe how deoxygenated blood flows through the heart

Deoxygenated blood from the body flows into the right atrium via the vena cava . The right atrium contracts, forcing open the tricuspid valve . This allows blood to flow from the right atrium into the right ...
AF
Answered by Anna F. • Biology tutor
3607 Views

Calculate the area of a circle with a diameter of 20mm

Firstly draw the circle and label the diameter. Then calculate the radius by dividing the diameter by 2 (radius is 10mm). Using the formula A=pi*r^2 to find the area. This gives the answer as 100pi mm^2 or 3...
EC
Answered by Ella C. • Maths tutor
18806 Views

What are the different uses of the perfect and imperfect tense?

The perfect tense is used to describe actions that have been completed, or that happened a certain number of times. For example if you want to talk about something that you did at a specific time in the past...
LM
Answered by Lucy M. • French tutor
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