Earth can be divided into four main systems or spheres. Which system contains Earth’s weather and forms the different climates around the world? A. Earth's inner layers of rock and metal
B. Earth's outermost later of gases
C. the parts of Earth that contain all living organisms
D. the parts of Earth that include all of Earth's water

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality

Asingle die is rolled twice. find the probability of rolling a 3 the first time and a 2 the second time