Answer:
y = -275x + 3000
Step-by-step explanation:
I graphed the points on the graph below and found the equation of the line.
The sum of two numbers is 50. One number is 10 less than three times the other number. What are the two numbrs
1 answer:
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The three scores are 86, 74, and an unknown score x. The average (i.e. the sum divided by how many there are) is 80, so we have
Multiply both sides by 3 and you get
Subtract 160 from both sides to get
Note: you could solve this exercise very quickly if you notice that the two numbers, 86 and 74, are symmetrical with respect to 80, which is the average. So, the third number must be the average.