A train travels from station P to station Q at a speed of 90km/h in 3hours 40minutes. The train stops at station Q for 25minutes before returns to station P. The time taken from station P to station Q. Calculate the average speed, in km/h, of the whole journey of the train

Consider the expression below. 9 + 4(x + 2) – 3.1 select the term that best describes "3" in the given expression. o a. coefficient variable exponent constant

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.