exam Maths Puzzle Numerical Ability

6 - 5[8-(2y-4)]
can you help me? I am not sure if the brackets are multiplied or not.
I came up with -54-10y and 8-(2y-4)

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exam Other Question

Can someone help solve this?
Let H(t)=4+4sin(pi t/2). Approximate to the nearest hundredth
all values t in the interval [0,4 pi] for which Ht=6. Graph the inequality, x < -2