What is 15/9 as a mixed number math

Can some one me, i’ve been asking for so long

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Which rule describes the composition of transformations that maps ajkl to aj"k"l"? ro. 900 o to, -2(x, y) to, -20 ro, 900(x, y) ro, 9000 t-2. o(x, y) t-2, 00 ro, 900(x, y)