A school administrator selects every 20th person on the list of names alphabetically to see what the favorite school subject is. Is this biased?

Literal equations: 1) 2a+4b=d Solve for b. 2) 4xy+3=5z Solve for y. 3) - 2 (3a-b) = c Solve for b.

what is the answer to 7.5 + (4.8+9.9) =

What is the solution to the equation - 2/3x+9=4/3x-3?

How does f (x) = 3x change over the interval x = 4 to x = 5

In chemist, you have 25 units of a solution that has 24% acidity. This solution consists of two different chemicals with different acidities. The first chemical has 30% acidity and the second chemical has 20% acidity.

Kim read 4/5 of her book and Grace read 6/10 of her book. who read more of her book, kim or Grace?

Jesse bought 3 sheets of stamps and Marco bought 2 times as many stamps. on each sheet there are 4 rows of stamps with 3 stamps in each row. How many stamps did Marco buy

2. Solve for the number. a. 75 is 20 percent of what number?

What is 47.2 % of 300?

12. Use the Distributive Property to write an expression that is equivalent to 2.5 ( - 10 + 3 3/4x - 6.2).