Asap ! use the quadratic formula to solve: 2ײ-7×-21=0 round your answer to two decimal places. 1 -5.43 and 1.93 2 -1.93 and 5.43 3 -4.5 and 0.98 4 no real solution

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

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.)

Acommunity group is building a garden on a rectangular lot of land. the lot measures 5x by 10x and the garden will be circular with a radius of 3x. how much of the land will be left over after the garden is built? a. 41 pi x^2 b. x^2 (50 - 9 pi) c. x^2 (50 - 3 pi) d. 41x^2