Simplify the expression:

(7 + 9i) (8 - 10i)

56 + 2i + 90

56 + 2i - 90i^2

97 + 72i

146 + 2i

A cashier checks the price of a leather wallet that is marked $7.41, because it usually rings up to $9.88. What is the discount in percentage

Simplify / sqrt{ / } 25^4t^2

How many integers less than one billion are very round numbers

Rodger is riding in a bike-a-thon to raise money for his favorite charity. The total distance of the bike of stone is 38.7 miles. So far he has completed one tenth of the bike-a-thon. How many Mouse has Rodger bike?

Find the slope of the line 8x+4y=8

Solve the inequality 7x ≥ - 7

The scale drawing of a window is 1 inch by 2 inches. The actual size of the window is 24 inches by 48 inches. What is the scale factor that is used to make the drawing?

Miranda and Savannah are excited that a new store just opened in town! They go together the first day it opens!

The solution to 4.2x = 19.32 is x = ___. 0.28 0.45 4.6 15.12

Richard has a rectangular plot of land that is 525 feet long and y feet wide. He decides to build a fence around the plot. If the perimeter of the plot is 1,504 feet, find the value of y