7 is not because a couple x values were repeated
8 is not because the x value -2 was used for two y values
9 is not because a couple x values were used for more than one y value
10 is a function is x alue is only used once
hope this helps :)
Answer:
a = 5/39
Step-by-step explanation:
We assume you want to solve the equation for "a".
-2 = 4a -7 +35a . . . . simplify
5 = 39a . . . . . . . . . . add 7
5/39 = a . . . . . . . . . divide by the coefficient of a
<h2>As a decimal: 20.56667</h2><h2>As fractions:
OR
</h2>
That would be -2 1/2 , 3 1/2
The approximate length of each highway in kilometers is 200.
