A student in a Pre-Calculus class has test scores of 70, 73, 61, and 79. The final exam is worth 2 test grades.

Question

Write a linear equation that models this problem, where
x
is the grade on the final exam and
y
is the student's grade in the course.
What grade is needed on the final to earn a B (average score of 80%)?

Anyone know how to do this???

Answer 1

the grade is just the weighted average of all the test scores.
The final is counted twice, making 6 scores to average
y = (70+73+61+79+2x)/6
so to get a B, find x where
y = 80
and round up.

Judging from the test scores, I don't see much chance of getting that B :-(