Precalculus, ! find the indicated sum. show your work. 4∑ (-1)^k(k+11). k=1i've solved it, i just need someone to check my work.

Aplot of land is shaped like a quadrilateral. fences are built on the diagonal to divide the area into 4 sections. what is vi to the nearest tenth? gv = 6.55fv = 5.84vh = 3.27vi = ?

Pls yall i really need the answer fr fr

To convert celsius temperatures to fahrenheit, you can use the expression (c + 32). tom says that another way to write this expression is c + 32. what error did tom make?