In a geometric progression, the sum of the first two terms is 7, while the sum of the second and third term is 28/3. Find the initial term and common ratio. Please help, it's due tomorrow

Solve for x and select the correct answer

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16

The ideal weight of a nickel is 0.176 ounce. to check that there are 40 nickels in a roll, a bank weighs the roll and allows for an error of 0.015 ounce in total weight