exam Maths Puzzle Numerical Ability

Could someone help out with this one? #80. Work. Henry sold 120 magazine suubscriptions in x+2 days. If he sold at the same rate for another week, then how many magazines did he sell in the extra week?
Thank you.

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exam Other Question

If the average (arithmetic mean) of x and y is k, which of the following is the average of x, y, and z?

(A) 2k + z/3
(B) 2k +z/2
(C) k+z/3
(D) k+z/2
(E) 2(k+z)/3 66x^2 + 67x + 10 =0
Solve followig the square root method or the quadratic formula.
Confused on how to work this out any help will be appriciated.