7.2 = 8t t = i need a little with this one

What is the solution to the equation 9^(x+1) =27

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)