6. If the following given four terms are in proportion, calculate the value ofx. a) 2, 4, 6, *
b) 6, 10, x, 5
c) 18, x, 30, 45
d) 50, 150, x, 15
e) x, 40, 30, 20

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

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