Pls help me, i am very confused and i have no idea what to do, i will give brainliest and 35 points you only have to do part one and part three, i can do part two.​

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

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