The teacher bought 126 notebooks, which were on a “buy 9 get 1 free" sale. If each notebook costs $1.80, how much
money did the teacher spend on these notebooks?
$

Consider the system: y = 3x + 5 y = ax + b what values for a and b make the system inconsistent? what values for a and b make the system consistent and dependent? explain

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

What is x3+3x2−16x−48 divided by x−1?