Which equaition has no solution

A. 2.3 + 2 + 3.1y = 4.3y + 1.6 + 1.1y + 0.4
B. 32x + 25 - 21x = 10x
C. 5/8x + 2.5 = 3/8 + 1.5 + 1/4x
D. 1/3+ 1/7y = 3/7y

Solve the system of equations. y= 2x y= x^2 - 15

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?