15, 18, 21
i don't know the other one, sorry
Answer:
4. Yes 5.No 6. No
Step-by-step explanation:
To be short,a linear equation has a coefficient of only 1 degree.
If the degree is over 1 it isn't a linear equation.
4 is the linear equation since it x value 7x has a degree of 1.
5 isn't becuase it's x value has a degree of 5
6 isn't becuase it degree is 4.
A: because "reflection across the y axis then across the x axis is the only option that does not work"
9,12,18 is a right triangle and so is 30,72,90
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