There are 5 small boxes in rectangle each box has length of 6 cm find the perimeter of all boxes

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

Find the maximum value of p= 4x + 5y subject to the following constraints :

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)