Find the x-intercepts of the parabola with vertex (-1,-16) and y-intercept (0,-15).
Write your answer in this form: (X1,71), (x2,42).
If necessary, round to the nearest hundredth.

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.