I will give brainiest for whoever answers my questions !!!

24.4%

Step-by-step explanation:

Percent is calculated as

× 100%

The choice here is alternative = 479 and total = 1960, then

percent = × 100% ≈ 0.24438.... × 100% = 24.4% ( to 1 dec. place )

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.