Options for the first one . A. f (x) =10 B. f (10) =x C. f(h) D. f(30) options for the second one . A. f (20)=10 B. f(20)=7 C. f (20)=17 D. f (20)=7and 17
options for the third one. A. f (20)=10 B. f(20)=7 C. f (20)=17 D. f (20)=7and 17

 21) A    22)  C   23) D

Step-by-step explanation:

21) option A

you are given the y-value which is f(x) and looking for the x-value  → f(x) = 10

22) option C

the x-value when y = 10 is 5 and also 20.

This is written in function notation as: f(5) = 10 and f(20) = 10

23) option D

when y=20, x = 7 and x = 17

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

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step-by-step explanation:

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