Answer:
210 high schoolers as ratio becomes 90:210
Step-by-step explanation:
we can see that 3:7 can be multiplied if 3 x 3 = 9 then 7 x 3 =21 we just add the zero and find a 90:210 ratio
The answer is option b.
Explanation in the pic.
Need any other maths, feel free!!
x+10 x ≠ 60
(x^2−50x−600)
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(x−60)
Factor the numerator
(x-60)(x+10)
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(x-60)
Cancel the like terms
x+10