silvia's test scores are 86,81 and 92 what must she score on her fourth test in order to have an average of 90 for all four test
2 answers:
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Answer:
C) x/2 +2y = 4
Step-by-step explanation:
Of the equations offered, only equation C has the given point as a possible solution.
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Since the graph is not given, we don't know if the given point is on the graphed equation.
Hello, find the work out in the attached image
X = 4.5
Y = -1
X = 4.5
Y = -1