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work out the value of 4a + 2b when a = 4 and b = 3

To solve this question you want to do it step by step. Firstly replace the 'a' with '4' and calculate the first part of the sum. 4 multiplied by 4, which is 16. Next replace 'b' with '3' and calculate the se...
JF
Answered by Joseph F. Maths tutor
33201 Views

Describe the different roles of aldosterone and cortisol in the body

Both aldosterone and cortisol are produced in the adrenal cortex of the adrenal gland (which are situated above the kidneys on either side of the body). Aldosterone is a mineralocorticoid and helps to contro...
AJ
Answered by Aiman J. Biology tutor
11899 Views

How do I analyse my A level texts effectively?

In literary analysis, it can be tricky to see what you should be looking for. Yet, consistently, we analyse without realising it. When reading a newspaper article, we interpret meaning, and a sophisticated r...
TG
Answered by Tallulah G. English tutor
2965 Views

Describe the roll of kupffer cells in the liver

Kuppfer cells are a specialised type of macrophage. They travel within the sinusoids of the liver and breakdown and recycle old red blood cells. Red blood cells contain heamoglobin, and when haemoglobin is b...
AJ
Answered by Aiman J. Biology tutor
9464 Views

How do I improve my essay writing?

It was only at university level that I learned to write a high quality essay. I now abide by the following: - Structure: most students know that an essay should have a beginning, middle, and end. But it's ea...
TG
Answered by Tallulah G. English tutor
3079 Views