Can anyone help me solve these Matlab questions?

Use vpasolve to approximate all of the solutions to 7+7+3r3 +8r2 +2 +3-0. Assign to p28. Use vpasolve to approximate an x-intercept of y = -cos( to p29. 9-7) +e(z/9-7)-7 near x = 54. Assign + 28-2 Use a nearby Use vpasolve to approximate the largest x-intercept of the function y = cosx sensible integer value of your choice. Find this nearby sensible integer however you wish, how you find it is not part of the assignment. Assign to p30 A surveyer standing at point A sights two targets, one at B and one at C. He measures that target B is 228 yards away, target C is 77 yards away and the angle between them is 21 degrees. Use solve and the Law of Cosines to find the distance between B and C. Assign to p10. Note: Using solve applied directly to the LOC will yield both a positive and negative solution - please do this