Answer:
Step-by-step explanation:
y + 1 = -9(x + 9)
y + 1 = -9x - 81
y = -9x - 82
answer is A
Answer:
C. 30+18x
Step-by-step explanation:
6x5=30
6x3=18
30+18x
Let f(x)=y
f^-1(x)=x
y=1/(x+5) - 1
y+1=1/(x+5)
(x+5)=1/(y+1)
x=1/(y+1)-5
f^-1(x)=1/(x+1) -5
denominator cannot equals to zero
x+1≠0
x≠-1
answer
B
Answer:
2.5 gallons of the 20% solution must be replaced by the 36% solution.
Step-by-step explanation:






4/3 can be written as 4:3 or 4/3 and is a real number