John and jacob set out together on bicycle traveling at 15 and 12 miles per hour, respectively. after 40 minutes, john stops to fix a flat tire. if it takes john one hour to fix the flat tire and jacob continues to ride during this time, how many hours will it take john to catch up to jacob assuming he resumes his ride at 15 miles per hour?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Someone answer this check out the image!

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