Three times the difference of a number and four is equal to eighteen

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

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.

Fawn bought a total of 70 cakes for a tea party. she spent $3,025. fawn bought vanilla cakes for $22 each and a fruit filled cake for $55 each. the system of equations below can be used to find the number of vanilla cakes, v, and the number of fruit filled cakes, f, fawn purchased. which system of equations has the same solution as the system below.