X³+y³+z³=k
can you solve this
if so you get brainiest

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid