A man goes on a journey for x km/hr what is his distance rate

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Jason went to an arcade to play video games. he paid $2 for every 11 tokens he bought. he spent a total of $16 on tokens. which equation can be used to determine,t, the number lf tokens jason bought

Factor the gcf out of the polynomial 9x^6+6x^4+15x^3