question 1:

which of the following expressions are equivalent to −3.5(2 − 3n) − 2.5n?

a. −7 − 8n
b. −7 + 8n
c. −7 − 13n
d. −7 − n(10.5 − 2.5)
e. −7 + n(10.5 − 2.5)

Simplifying:-
-3.5(2 - 3n) - 2.5n
= -7 + 10.5n - 2.5n
= -7 + n(10.5 - 2.5)
= -7 + 8n

so B and E

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)