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Are the severity of famines caused by human or physical factors?

Physical factors such as changes in the El Nino weather cycle can cause famines as changes in the cycle can cause droughts in sub-saharan Africa or Southern Asia. However these droughts can be either miti...

Answered by Dermot N. • Geography tutor

1476 Views

What is the structure of a protein?

Proteins are a class of molecules made up of small sub-units called amino acids. Every type of protein has a unique structure. The primary structure of a...

Answered by Joanna B. • Biology tutor

1738 Views

each month Rohan spends all his income on rent, travel and other living expenses. 1/3 of his income is used for rent, 1/5 on travel and £420 on other living expenses ... work out his income each month

1/3 + 1/5 = 8/15 (amount spent on rent and travel) 1 - 8/15 = 7/15 (amount spent on living expenses) 420 ÷ 7/15 = 899.999... = £900...

Answered by Rohan K. • Maths tutor

4078 Views

Solve the simultaneous equations, 3x + y = 10 and x + y = 4.

Firstly we want to get both equations in terms of one variable.3x + y = 10y = 10 - 3
x + y = 4y = 4 - x
Make these two equations equal10 - 3x = 4 - x
Rearrange the numbers to one side and t...

Answered by Brenda L. • Maths tutor

3663 Views

Tom bought a full bag of coal. After one week the bag was 2/3 full. During the next week he used 1/4 of the remaining coal. How much is left?

This question is going to involve multiplying fractions. The question tells us that in the first week 1/3 of the coal was used, and 2/3 was left.Then in the second week the used 1/4 of the remainders, lea...

Answered by Brenda L. • Maths tutor

6673 Views