Speed of the boat = u
speed of the current = v
in downstream,
u - v = 105/5
u - v = 21
in upstream
u + v = 105/7
u + v = 15
add both equations
2u = 36
u = 18
v = -3
so
speed of the boat = 18 km/h
speed of the current = 3 km/h
Answer: 0
Step-by-step explanation:
We can unsquare the squareroots:
x^2=36
Becomes
x=6 (because 6*6 is 36)
similarly,
y^2=81
Becomes:
y=9(because 9*9=81)
When you have a squareroot no matter if it’s negative or positive the result is a positive number.
Now we can solve and eliminate possible solutions.
For A) -9+(-6)=(-15)
For B) (-9)+6=(-3)
For D)(-6)+9=3
For E) 9+6=15
The only one that cannot be made is C)0
Answer:
about 4.63 teaspoons
Step-by-step explanation:
You can write the proportion ...
(teaspoons)/(fraction of RDA) = 1.75/0.85 = x/2.25
where x represents the unknown number of teaspoons. Multiplying by 2.25 gives you ...
x = 2.25(1.75/0.85) = 4.632...
About 4.63 teaspoons of vitamin will supply 2.25 times the RDA.
___
That's between 4 5/8 and 4 2/3 teaspoons, roughly 22.8 mL.
The initial amount was 200 dollars.
If you sub in 0, you get the amount at 0 months.
Rate of change is the slope. You are losing -75 a month, which is the rate of change.
Answer:
The slope is 1/2
Step-by-step explanation:
The equation is y= 1/2x +2
So the slope would be 1/2