Select the correct answer.
which relation is a function?
a.
{(2, 3), (1, 5), (2, 7)}
b.
{(-1, 5), (-2, 6), (-3, 7)}
c.
{(11, 9), (11, 5), (9, 3)}
d.
{(3, 8), (0, 8), (3, -2)}

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arrange the systems of equations that have a single solution in increasing order of the x-values in their solutions.
2x + y = 10
x − 3y = -2
x + 2y = 5
2x + y = 4
5x + y = 33
x = 18 − 4y
y = 13 − 2x
8x + 4y = 52
x + 3y = 5
6x − y = 11
2x + y = 10
-6x − 3y = -2
y = 10 + x
2x + 3y = 45

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Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?

Urgent! 20 points! here is a you are the new manager at trusty goods wholesale produce. you need to figure out how to adjust the amount of produce in your notes after the events of the day: you got 5 more crates of bananas someone returned 2 crates of apples a worker dropped a crate of grapes (oh no! , you had to throw them out) you sold a crate of bananas you sold 5 crates of apples can you write an expression to describe your day using: "a" for crates of apples "b" for crates of bananas and "g" for crates of grapes? make sure the expression is in simplest form question 2 (3 points) explain your steps using sentences.