Triangle PQR is such that P=(1,3) , Q=(1,1) and C=(4,1). It is enlarged to form triangle P'(-3,1) ,Q'(-3,-5) and R'(6,-5). Locate the center of enlargement and state the scale factor. Help brainliest for correct and good explanation.​

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]