PQRS is a quadrilateral. The sides RS and QR are the same length. The sides QP and RS are parallel. Oh and also line SQ is 12cm and line QR is 9cm and is equal to line SR. Calculate: 1- angle SQR
2- angle PSQ
3- length PQ
4- length PS
5- the area of PQRS

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6