Answer:
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Step-by-step explanation:

To find f(19) , substitute the value of x that's 19 into f(x). That is for every x in f (x) replace it with 19
We have

We have the final answer as

Hope this helps you
Answer:
230
Step-by-step explanation:
30 times 90 equalls 230
I believe you'd multiply 46.93 by 1.8 giving you 84.474 ft
Tax is 5% of the original price. So if i multiply by 20 i can easily find the original 100%.
20 x $43 = $860
You can check if by doing 860 x 0.05 = $43
No
For future reference: When two triangles are congruent they will have exactly the same three sides and exactly the same three angles. The equal sides and angles may not be in the same position (if there is a turn or a flip), but they are there.