Half of the sum of six and three then divided by seven

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

X-intercept=-5 y-intercept=2 the equation of the line is