Answer:
-78.12
Step-by-step explanation:
a 12.4x-6.3= -78.12
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Answer:
The test contains 10 three-point questions and 14 five-point questions
Step-by-step explanation:
Given equations are:

From 2nd equation we can deduce that x represents number of 3-point questions and y represents number of 5-point questions.
Using the substitution method:
From x+y = 24
y= 24-x
Putting this valu of y in 3x+5y=100

Hence, the correct answer is:
The test contains 10 three-point questions and 14 five-point questions..
Answer: divide the area buy the sides
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