What is the following sum? 4 (RootIndex 5 StartRoot x squared y EndRoot) + 3 (RootIndex 5 StartRoot x squared y EndRoot)

Ared balloon starts at 7.3 meters off the ground and rises at 2.6 meters per second. a blue balloon starts at 12.4 meters off the ground and rises at 1.5 meters per second. when will the balloons be at the same height?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Can anyone explain to me how to do this? anything will .