What the answer I nee this so I can move to the 9th grade

Which value is not a solution of 8x^3 – 1 = 0

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Ke’ajah has a coupon for 1/3 off the regular price, t, of a tent. which expression represents the price of the tent using the coupon? select the two correct expressions. a. 1/3t b. 2/3t c. t - 1/3 d. t - 2/3 e. t - 1/3t f. t - 2/3t