If a and b measures of two first quadrant angles and sin⁡〖a= 4/9〗 and sin⁡〖b= 2/5〗 find sin⁡(a+b).

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Graph the equationy= x+3[tex]y = x + 3[/tex]

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?