Answer:
Is the 3x a power of 2, once I get that info I'll edit my answer
Step-by-step explanation:
Because percentage is the numerator divided by the denominator of a fraction times one-hundred, we can set up this equation:
Now, we cross multiply.
Next, we divide both sides by 0.55 to get x by itself.
x = 60
So, 33 is 55% of 60.
Answer:
7
Step-by-step explanation:
Convert 87.5% to a decimal.
87.5%/100%=.875
Multiply it with 8 to get 7
.875*8=7
Let b and s be the velocity of the boat and stream respectively....
3(b-s)=27
b-s=9
b=9+s we will use this in the second equation....
2(b+s)=30
b+s=15, now use b found above in this to get:
9+s+s=15
2s+9=15
2s=6
s=3, and since from earlier b-s=9, b=9+s so
b=12
So the speed of the boat is 12mph and the stream is 3 mph
4/3.2 = 7/x
4x = 22.4
/4
x = 5.6