What is the x-value in the solution to this system of linear equations?

2x+3y=3

7x-3y=24

a. (2,7)
b. (3,-21)
c. (3,-1)
d. (9,0)

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25