Which expressions are quadratic expressions? Check all that apply. z^2
2x + 7x – 10
2x^2 + 9x – 7
500(0.25)^t – 1
13x^3 + 21x^2 – 5
There is more than one answer. Please answer fast. I will mark brainliest!

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex