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Solve the system of equations by substitution. 8x + 7y= -77 X - V= - 4 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The solution set of the system is (Simplify your answer. Type an ordered pair.) O B. There are infinitely many solutions. O C. The solution set is the empty set.Solve this system of equations. Write the solution as an ordered triple. Select the correct choice below and fill in any answer boxes 3x + 3y + z = 21 within your choice. x - 3y + 2z = - 19 8x - 2y + 3z = 14 O A. There is one solution, (Type exact answers in simplified form.) O B. The system is dependent. O C. There is no solution.Solve the given equation by the zero-factor property. 35x2+12x+1= The solution set is D. [Simplify your answer. Type each solution only once. Use a comma to separate answers as needed. Type an integer or a fraction.) Find the point on the plane x + 3y + 2z = 18 closest to the point (1, 1,1). The closest point is (Simplify your answer.)2 2 . + + z = 78. Find the maximum and the minimum values of f(x,y,z) =7x - 2y + 5z on the sphere xWrite a in the form a = aT + a N at the given value of t without finding T and N. r(t) = (Be sin t)it (Be'cos t)j+ (Be',6)k, t=0 a(0) = T + N (Type exact answers, using radicals as needed.)