I really just need help finding Sy (S_y) with this data. The way I am doing it isn't giving me the correct answer. Please show work. Here is the data: x y
0 -0.000833333
0.1 0.000666667
1 0.0152
2 0.0346
4 0.0643
10 0.1655
20 0.3271

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

Ithink i know it but i want to be sure so can you me out ?

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet