Write the expression as the sine or cosine of an angle.

sin 7y cos 3y - cos 7y sin 3y

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle