If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a=

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?