Make a proportion:

Then cross multiply and divide to solve.
20x=119
x=5.95
The answer is $5.95
Answer:
y = lnx / ln 7.
Step-by-step explanation:
x = 7^y
Take logarithms of both sides:
ln x = ln 7^y
ln x = y ln 7 ( because ln a^b = b ln a. One of the Laws of Logarithms).
y = lnx / ln 7.
Answer:
7x+12
Step-by-step explanation:
You do 10x-3x since they both have the x variable they can be combined to make 7x and the 12 is left alone.
Just divide 300 by 4 since 25% is 1/4
300/4 = 75
D. 75
Hope this helps!