y = 4x^2 + 20x + 11 is a curve. Find the minimum point of the curve.
Differentiate equation = 8x+ 20Set differential to 0 and calculate xx = 2.5
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All answers ▸There are 150 men, women and children on a plane. For every 7 men there are 2 women, and for every 1 woman there are 3 children. How many men are on the plane?
The diameter of a ring is 19mm. Calculate the area of the ring in cm^2, giving the area to 3 significant figures.
solve this equation: 4(x-5)=x+7
Find an equation of the straight line that is perpendicular to the straight line x + 3y = 7 and that passes through the point (4,9).