3√50·√22 = 3√1100 = 3√11·10² = 30√11
√162x³y² = √2·3⁴·x³·y² = 9xy√2x
Answer:
D. $126.79 + (-$75.10)
Step-by-step explanation:
R=rate of boat in still water
c=rate of current
d=rt
since you're given that the time it takes to travel the same distance downstream and upstream, your equation will be d_1=d_2, or rt=rt
the rate upstream is r-c and the rate downstream is r+c (because the boat's and river's rates add up)
since you know t_1 and t_1 are 5 and 3, you can now set up 2 equations
<u>5*(r-c)=45</u> because (time upstream)*(rate upstream)=distance=45 miles
r-c=45/5=9
<u>3*(r+c)=45</u>
r+c=45/3=15
r-c=9 and r+c=15, so r=12 mi/h and c=3 mi/h
If you have any questions please ask
Answer to first one is X = 9
Answer to second one is X = 35
Answer:
$4 off
New price is $36
Step-by-step explanation:
