The mean length of 4 childrens' index finger is 8.6cm. The mean length of 11 adults' index finger is 17.8cm. What is the mean length (rounded to 2 DP) of these 15 people's index finger?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.