Without values for the other variables, I assume you're asking for a literal equation.
12y+d=-19y+t
31y+d=t
31y=-d+t
y=(-d+t)/31
A statement best describe the polynomial
B. The mean; in a normal distribution, the mean is always greater than the median
The mode's of this set of data are 1,2, and 4.
The fraction of this decimal is 1/5