98 points and brainliest answer for explaining your ! i dont ! even if you at least answer number 3 that would mean a hole !

2.

(a) No two ordered pairs have the same x-coordinate. That makes it a function.

(b) If the same x-coordinate appeared twice. For example, if the last point were replaced with point (4, 21), then it would not be a function since now there are two points with the same x-coordinate, 4.

(c) For each point, multiply x by 2. Then subtract 1. You will get the correct y-coordinate. The function is:

f(x) = 2x - 1

4sqrt5

step-by-step explanation:

the base has dimensions of 8 x 4, so the diagonal is 64 + 16 square rooted or 4sqrt5.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions