A teacher has 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total?

Which is the graph of linear inequality x - 2y ≥ - 12? On a coordinate plane, a dashed straight line with positive slope goes through (negative 8, 2) and (0, 6). Everything to the right of the line is shaded.

Indicate the formula for the following conditions. C (n, r)

A table is originally priced at $160 dollars. The onlime retailer gives a discount and the table is now priced $64 dollars. What is the percentage discount for the coast of the table?

In 1998, Mary Meagher set the women's world swimming record for the 100-m butterfly. She swam the distance in 57.93 seconds. On average, how long did she take to swim 10 m?

The maximum value of f (x) = 2x3 - 18x2 + 48x - 1 on the interval [0, 3] is - 1 39 35 71

Add. (7t2+t+8) + (9t+1)

Adam has 4 apples. He shares 2 with a friend. How many apples does he have left?

What is the solution of x+4/2x-2<0?

Asking for a date through a twitter post and asking for a date in French, the romantic language is this disjoint event

What is the domain of the function y = x2 + 4x - 2? a. All real numbers b. x < 6 c. All negative numbers d. y > 6