PLS SOMEONE HELP ME WITH THIS I DONT GET I NEED HELP PLS CAN SOMEONE PLS HELP MEEE I ALREADY DID NUMBER 3 I JUST NEED 4 AND 5 PLS

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

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

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.