Let the score on her seventh test be "x".
SO,

∴ He must get 104% on his seventh test to get an average score of 90%

can also be written as 2i
where i = √-1

Rationalizing denominator,
Answer:
the answer would be done like this
Step-by-step explanation:
you have to get y by itself so you would need to move the x to the right of the equal sign
once you move anything to the opposite side it switches, so positive becomes negative vice versa
-3y=-x+18
you need to make sure you have positive 1 y so you would divide y by -3 to make it 1
everything else is multiplied by -3 as well
so the answer would be y=⅓x-6
Answer:
Answer is J
Step-by-step explanation:
Count the height of each traingle and divide both of them, it's also going to be greater than 1X since the dialted image is larger than the original