How do i solve this system using substitution: y = x - 7 ; 2x + y = 8

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false

Miranda is braiding her hair.then she will attach beads to the braid.she wants 1_3 of the beads to be red.if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16