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A person leaves their flat at 8:00am and travels to work at an average speed of 32 mph. They arrive at work at 9:15am. Calculate the distance they travel to work.

SUVAT equations give s = vt ; v = 32mph ; t = 1h 15mins = 1.25h ; s = 32 * 1.25 = 40 miles
OT
Answered by Oliver T. • Maths tutor
3629 Views

Write x^2+6x+14 in the form of (x+a)^2+b where a and b are constants to be determined.

Completing the square is a method that can be used to solve the quadratic equation x^2+6x+14 in the form of (x+a)^2+b. The way we find a and b is as follows:For constant a , is found by halving the coefficie...
CD
Answered by Chara D. • Maths tutor
9619 Views

Most cases of scarlet fever occur in children. Adults have usually developed immunity to a toxin that the Streptococcus bacteria produce during infection. Explain how an adult develops immunity to the toxin.

Previous exposure to the toxin confers immunity by eliciting an immune response whereby b-cells differentiate into plasma cells allowing the production of antibodies. These will in turn stimulate production ...
GS
Answered by Georgia S. • Biology tutor
9513 Views

Factorise x^2 + 4x + 4

Factorising takes the form of (x+a)(x+b) where in this case: a+b = 4 anda*b=4this is taken from the original equations coefficient to x and the constant value.factorising gives (x+2)(x+2) which is equivalent...
RS
4084 Views

What is the difference in use between 'por' and 'para'?

Unfortunately, there is no easy rule to known when to use 'para' and when to use 'por' - you just have to memorise the different situations in which they apply. These are the key scenarios/circumstances whic...
AC
Answered by Angus C. • Spanish tutor
2390 Views