The estimated population of the world was 1.6 billion in 1900 and 4.0 billion in 1975 what is the percent of increase

Simplify each expression. 1) - 6k + 7k What is the answer to this problem

the formula for simple interest is I=Prt, where I is interest, P is principal, r is interest rate, and t is time in years. Which equation can be used to calculate principlal, p?

Write x2 - 8x 13 = 0 in the form (x - a) 2 = b, where a and b are integers. (x - 4) 2 = 3 (x - 3) 2 = 2 (x - 2) 2 = 1 (x - 1) 2 = 4

A helicopter flies horizontally at 100 km per hour. It takes 20 seconds for the helicopter to fly from directly overhead to being at an angle of elevation of 60 degrees. Find the height of the helicopter above the ground.

Two subtracted from b is greater than - 18

Which answer shows this equation written in standard form? 8 - 1 (x - y) = - 3x + 5 A. 2x + y = - 3 B. 2x - y = - 3 C. -4x + y = - 3 D. 2x + y = 13

What is the greatest six digit number in which the thousands place is twice the digit in the tens place what is the least number

What fraction is equivalent to 1/2?

Write 33% as a fraction or a mixed number

If (2a+3b) = 2 what is the value of (2a-3b)