c. the number of persons allegric to penicillin
8 because 2 times 5 is ten
The riddle given by Dr. Watson to Sherlock Holmes is:
217 is to 335
896 is to 543
345 is to ____
We need to find the missing number of the third pair of the riddle. This is a ratio and proportion problem.
217/ 335 = 896/ 543 = 345 / x
The value of x is 209.
All digit of the number 12.34 are significant.
In each table, the x-values differ by 6. A linear function will also have a constant difference of y-values. Only the 4th table has that.
(x, y) = (-6, -3), (0, 2), (6, 7), (12, 12)
_____
An increase in x by 6 produces an increase in y by 5. The slope of this linear function is 5/6. In slope-intercept form, the equation is y = (5/6)x + 2.
