3x+5y+4z=13
5x+2y+3z=-9
6x+3y+42=-8

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6