I need help please #26

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box