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Outline the role of phagocytic white blood cells in defence against pathogens

Phagocytes are part of the innate immune system. They are primarily responsible for clearing extracellular infections e.g. bacteria or fungus, by recognising and ingesting the pathogen. Typically, pathoge...

Answered by Adeline R. • Biology tutor

1857 Views

Solve x/2 + 3x/(x+) = 1

(x/2) + 3x/(x+1) = 1x(x+1) + 6x = 2x + 2x² + x + 6x - 2x = 2x² + 5x - 2 = 0
Using the quadratic formula,
x₁ = (-5+(29)^1/2)/2x₂ = (-5-(29)

Answered by Emily D. • Maths tutor

2824 Views

Show that a parallelogram is composed of an isosceles trapezium and an isosceles triangle

Draw a parallelogram composed of a trapezium and a traingle.Label:obtuse trapezium anlges as aacute trapezium angles as bbase triangular angles as ctop triangular angle as d
By definition of a parall...

Answered by Emily D. • Maths tutor

3312 Views

Show that 0.81 reocurring = 9/11

Let x = 0.8181818181...
100x = 81.81818181...100x - x = 81.81818181... - 0.8181818181(100 - 1)x = 8199x = 81x = 81/99x = 9/11

Answered by Emily D. • Maths tutor

3348 Views

Are monopolies more efficient than firms under perfect competition?

Monopolies are the sole suppliers in a market, who are price makers, can create barriers to entry, create a unique product, and face a downward sloping demand curve. Under perfect competition, there are m...

Answered by Alex K. • Economics tutor

3336 Views