The population of China is approximately 1.381 * 10^9, and the population of the United States is approximately 3.23 * 10^8. About how many people live in both countries combined? Express your answer in scientific notation.

Is 12 a prime or composite number? And why?.

Which is the slope of a line with the coordinates (1,4) and (3,1)

2783 and 7283 the value of 2 in

450 square feet of the field were covered with weeds. Each year, Gloria removes 35% of the weeds. Which equation can be used to model the area covered with weeds, t, in square feet, as a function of the number of years, y, Gloria has owned the field?

Put 2x - 4y = 8 into y = mx + b form

Find the measures of

Which value of x makes this inequality true? X + 9 < 4x

Find the value of f (-8) if:f (x) = 12x-29

How to explain that x/y can result in either a positive or negative quotient

Simplify 2a2b3 (4a2 + 3ab2 - ab) = ? A. 8a4b3 + 6a3b5 + 2a3b4 B. 8a4b3 + 6a3b5 - 2a3b4 C. 8a4b5 + 3a3b5 - 2a3b4 D. 8a4b5 + 3a3b5 + 2a3b4