Is a biased sample valid

Q-4. Suppose A is the set composed of all ordered pairs of positive integers. Let R be the relation defined on A where (a, b) R (c, d) means that a+d=b+c. Prove that R is an equivalence relation. Find [ (2,4) ].

What is the perimeter of the 22 the shape

The table shows the results of a random survey of students in grade 9 and grade 10. Every student surveyed gave a response. Each student was asked if he or she exercised less than 5 hours last week or 5 or more hours last week.

Gcf 10 and, 45 to each pair of numbers

30 + 54 what is the sum of the number and the product of their gcf and another sum?

What is 13.48 rounded to the nearest tenth

What does 21 over 8 equals

An orange is shot up into the air with a catapult. The function h given by h (t) = 15+60t-16t^2 models the orange's height, in feet, t seconds after it was launched select all the true statements about the situation.

Aaron, a car salesman at KIA, makes 4% commission on all sales he sells 5 cars for $15,000 each. What was the total commission on his sales.

What is y + 10 = - 3 (x + 10) in slope-intercept form?