Which of the following is a quadratic equation that has roots of 2.5 and 2/3
a. 5x^2+11x-7=0
b. 6x^2-19x+10=0
c. 5x^2+11x-10=0
d. 6x^2+19x-10=0

If you answer right ill give brainliest, : )

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?