PLEASE HELP ASAP PLEASE DONT PUT RANDOM ANSWERS I NEED THE CORRECT ONE PLEASEE

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Your company will replace the asphalt roofs on all the buildings at the factory complex shown below. the buildings have flat roofs. you charge according to the total roof area. what is this area, in square yards?

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss,how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.