Plz ! + brainliest

a portion of the graph of f(x) = −x2 − 10x − 21 is shown. which of the following describes all solutions for f(x)?

a. (x, x2 − 10x − 21), where −7 ≤ x ≤ −3
b. (x, y), where −7 ≤ x ≤ −3
c. (x, x2 − 10x − 21), where −8 ≤ x ≤ −2
d. (x, y) for all real numbers

You have 3 boxes, one "strawberries"; one "mentos" and one "mixed".but you know that all the labels are in incorrect order .how do you know witch is witch?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.