Apart from simply providing water and fertilizing the soil, what major engineering project did river systems support?

150% of what number is 180

Miguel has 138 fluid ounces of lemanade. How many 6-fluid-ounces serving of lemonade can he make?

Find a1 for the geometric series with r=3 and s6=364

If ABC XYZ, mA = 50°, and mY = 70°, find mC

Simplify 4^7/5^2 all raised to the 3rd power 4^10/5^5 4^4/5 4^21/5^6 12^7/15^2

Jill said that an angle is made of any two rays. Is she correct? Explain

Ebert is 14.5 ft from the base of the school flagpole when he sees a pigeon at the top of the 26 ft high flagpole. From where he is standing, what is the angle of elevation when he looks up to the top of the flagpole? Round to the nearest hundredth.

What is the quotient of 3.33 * 10-5 and 0.06?

What numbers add to - 49 and multiply to 0

What is the best chess move to win all the time?