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Why do blood clots form after a skin wound and how does this process occur?

When the skin is cut, we lose blood and there is a site for pathogens to enter our bloodstream, making us vulnerable to infection. To prevent this from happening, the body quickly forms a blood clot which al...
CA
Answered by Chloe A. • Biology tutor
5145 Views

Simplify (14y^2)/y + 5y x 2

(14y^2)/y = 14y5y x 2 = 10y14y + 10y = 24yThe division and multiplication must be performed before the addition. This can be remembered with the acronym BIDMAS.
JM
Answered by Jacob M. • Maths tutor
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10 girls and 15 boys sit a test. The mean mark for the boys is 70. The mean mark for girls is 82. Work out the mean mark for the whole class.

boys' total = 70 x 15 = 1050 girls' total = 82 x 10 = 820 Total = 1870 mean = 1870/ 25 = 74.3
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Answered by Sharon C. • Maths tutor
10820 Views

The graph of y = x^2 – 1 is translated 3 units to the left to give graph A.The equation of graphA can be written in the form y=x^2 +bx+c Work out the values of b and c.

identify what the question is asking -> both translation rules and expansion of bracketstranslation rule --> translation of 3units left on x-axis actually gives a the graph of y=(x+3)^2 -1. This is bec...
GP
Answered by Georgia P. • Maths tutor
8519 Views

Solve simultaneously: 3x+2y=7 & x-2y=-3

Add the 2 eqns together to eliminate the y's to give: 4x=4. Divide by 4 to give x=1Now substitute x=1 into the first eqn: 3+2y=7. Subtract 3 from both sides -> 2y=4. Divide by 2 to give y=2.Now, check by ...
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Answered by Katie L. • Maths tutor
5492 Views