Find the common difference of the arithmetic sequence. 13, 18, 23, 28,...

The common difference is □.​

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?