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WHAT IS THE EQUIVALENT TO: -2 f(-6) + 8 f(5) – f(10)

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Find the value of x. give reasons to justify your solutions! c ∈ ae

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$