Pls help me for part A and B if correct I will mark brainslit :)) !!

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

  cassidy wants to cut the yellow fabric into strips that are 0.3 yards wide. how many strips of yellow fabric can cassidy make? yellow fabric 16 yards for $108.00.

When you flip a biased coin the probability of getting a tail is 0.6. how many times would you expect to get tails if you flip the coin 320 times?