exam Maths Puzzle Numerical Ability

Simplify. Assume variables are nonnegative.

-3sqrt50

sqrt(18ab) * sqrt(6ab^3)

sqrt54/sqrt24

sqrt(1/7)

sqrt12 + 2sqrt27 - sqrt48

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exam Other Question

i need to graph these three but i dont know how?

there all supposed two be graphed on one graph

(there three things to this problem)
y=2x^2
y=2(x-1)^2
y=2(x+3)^2

(there please help me with this one.

Problem

There are two companies that sell widgets. Both companies sell the widgets to the general public for the same price. In order to earn bu