Unit test 1
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2x + 3y = 5x - y
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Complete the missing value in the solution to the equation.
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Step-by-step explanation:

you need to do Gems as an hint what is gems u may be asking it is grouping exponents  multiplication subtractin

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

i think it is c, not positive though

step-by-step explanation: