Evaluate this expression for the given value of the variable 4 (d+7); d=-2

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Ineed to find the answer to number 2

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)