Emily bought a pair of shoes for $60 and x pairs of socks for $5 per pair. The total amount se paid, in dollars including tax, is described by the expression 1.06\left(60+5x\right)1.06(60+5x). What is the meaning of 5x?

Can someone me with my hwplz(only the circled ones)

What is sin 7x/4 ? i need on this urgent trig

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14