100°+(4y+25)+(3y+20)=180°
100+4y+25+3y+20=180
7y+145=180
7y=35
y=5
100°; 45°; 35°
Answer:
5y + 15
Step-by-step explanation:
8y - 6y = 2y + 3y = 5y
13 + 2 = 15
Answer:
In linear algebra, a coefficient matrix is a matrix consisting of the coefficients of the variables in a set of linear equations.
Step-by-step explanation:
the matrix is used in solving systems of linear equations
