Replace ∗ with a monomial so that the result is an identity:

1. (2a + ∗)(2a - ∗) = 4a^2–b^2

2. (∗− 3x )(∗ +3x) = 16y^2–9x^2

3. 100m^4–4n^6 = (10m^2−∗)(∗ +10m^2)

4. m^4–225c^10 = (m^2−∗)(∗ +m^2).

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

How can you find the mean absolute deviation (mad) for this set of data?

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=