You are a test engineer. An experimental aircraft you test flies 1.3- , 1.2- , and 1.5- hour flights during day 1 of the test. what is the total flight time for the day in hours?

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3