Izzie recently took a math test where each correct answer (a) was worth 7.8 points. She also correctly answered a bonus question worth 15 points. Using the equation 7.8a + 15 = 77.4, how many questions on the test did Izzie answer correctly?
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If you have done that much proceed for getting the value of a and you would get the solution....
Okay, let me do it....
7.8 . a + 15 = 77.4
=> 7.8 a = 62.4
=> a = 62.4/7.8 =8
Therefore, total questions answered correctly by Lizzie = a + 1 (since, 1 bonus question was answered correctly by her)
= 8 + 1
= 9
Hope, it helps you
Mark it as the brainliest pls...
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