5+2f; f=6.1 how do you do it im so confused

Write the expression - 3x^2+2y^2+5xy-2y+5x^2-3y^2 in the simplest form

Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000. How many pennies in Russell's collection are dated after 2000

The perimeter of a rectangle is 14 feet, and the area is 12 square feet. what is the width of the rectangle?

Volume of a sphere with radius 9 yd

Which of the following is equal to tan (A) ? cot (A) cot (B) tan (B)

Lucy wants to divide 18.6 by 1.2 in order to estimate the quotient which is the best expression to use? A:10:1 B:10:2 C:20:1 D:20:2

Makes a manifesto where it expresses a commitment for the respect and tolerance for the other and the other

What is uses numbers, variables,& operation symbol

What is the answer to 7 (10-3x) = 5 (10-4x

The record low temperature for a city is 124 degree less than the high temperature. The sum of the high and low temperature is 72 degrees. What is the record low temperature