Mark completes 14 projects at school per week for w weeks in a row. each week, his best friend mary completes half as many projects as mark completes. together, they complete 126 projects. which of the following is the number of weeks it took mark and mary to complete 126 projects?

welll its a very hard question but ill

step-by-step explanation:

first you take the 6 dollars and add 10 to it then add the 50 to that then multiply by 8 with xy and your answer will be

hope this

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.