8.6 dived by 3.3 and the other way around

To prove (1/p+q+x) = 1/p+1/q+1/x

13. Solve the following system by any method. 8x + 9y = - 5 - 8x - 9y = 5

Russell has a collection of 1,500 pennies. Of these pennies, 20% 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?

Factor Completely: x^2 - 169 A) (x - 4) (x + 42) B) (x - 13) (x + 13) C) (x - 13) (x - 13) D) (x + 16) (x - 10)

The dimensions of a room are 20 ft by 18 ft, respectively. Find the length across the diagonal of the room.

In this equation, the variable is divided by 8. What is the reverse of this operation? -21 A. Multiplying by - 8 B. Dividing by - 8 C. Multiplying by 8 D. Dividing by 8

Which is the angle measure represented by 7.5 rotations clockwise? a. - 2700° c. 2700 b. - 1350° d. 1350°

Miguel measures 5kg of rice. One kilogram is approximately equal to 2.2 pounds. Which measurement is closest to the number of pounds of rice? 2.5? 7? 11? 14.2, and how?!

Find the hypotenuse c of the right triangle a=15, b=20

Evaluate the following examples of the greatest integer function: f (3.4) = [[3.4]] = f (0.8) = [[0.8]] = f (-1.7) = [[-1.7]] = f (-3.5) = [[-3.5]] =