Answer: x = 9
Step-by-step explanation:
x + 20 = 29
x = 9
9 + 20 = 29
Answer:
y=2x-4
I think this is right
Step-by-step explanation:
Answer:
Step-by-step explanation:

Here is the exact construction of √40 using Pythagorean 's theorem
The inverse for f(x)=2x+4 is f-1(x)= x/2 -2
Answer:
i dont know how your teacher teaches it but in the first question take away the y after the 25. number 2 the start equation would be 55=2x+25 then you would subtract 25 from each side to get 30=2x, the divide by to to get x=15 or she made 15 calls. number 3 is correct.
i hope this helps