Tomas’s math class held a raffle. The student who picked the ticket with a pair of equivalent equations on it would win. Which is the winning ticket? x squared minus 3 x y + 4 minus 2 x squared = negative x squared minus 2 x y minus x y + 4

7 y squared minus y z + 4 minus 2 y z = 7 y squared minus 2 y z + 4 y z.

3 a squared minus a b + 3 minus 3 a b = 6 a squared minus 2 a b + 3 minus 2 a b

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9 s squared minus s t + 5 minus 3 s t = 6 s squared minus 3 s t + 5 + 3 s squared

It's the first one, I just took the quiz on edge.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!