Plss help :( Balance and classify the reactions below as synthesis (S), decomposition (D), single replacement (SR), double replacement (DR), or combustion (C).

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units