Please help ;( 4. Alex bought a guitar pick for 25¢. He paid
the exact amount, so he received no change.
a) List the combinations of coins that
Alex could have used to pay for the
guitar pick.

b, what is the least number of coins that Alex could used?

c, what is the greatest number of coins that Alex could have used ?

d, Could he have paid for the guitar pick using seven coins?

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