Solve the system of equations below by substitution y equals x to the second power +6x plus 9 y equals negative x +3

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

b, i believe, but not sure.

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%