Simplify

tan(t)/sec(t)-cos(t)

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Abcd is a square. what is the measure of angle bac