Please help and show work if possible

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).