To get a B in math, Alexandria Pappas must average at least 80 on her five tests. Scores on the first four tests were \( 80,75,84 \), and 78 . What is the lowest score that she can get on the last test and still get a B? The lowest possible score on the last test for getting a B is T.

To find out the lowest score that Alexandria needs on her last test to average at least 80, we first calculate the total score required for five tests: \( 80 \times 5 = 400 \). Next, we sum up her first four test scores: \( 80 + 75 + 84 + 78 = 317 \). Now, we can determine the score she needs on the last test by subtracting the total of her first four test scores from the total required: \[ T = 400 - 317 = 83. \] Thus, the lowest possible score on the last test for getting a B is 83.