when Marla round and 19.95 to the nearest tenth she found the number change to 20. Explain how this is right plz
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Answer:
(E) b > 0
Step-by-step explanation:
a+b > a-b
Subtracting a on both sides,
a+b-a > a-b-a
b > -b
Adding b on both sides,
b+b > b-b
2b > 0
b > 0
Answer:
e. b>0
Step-by-step explanation:
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The speed of the boat in still water will be 30 miles per hour and the speed of the current will be 6 miles per hour.
What is the solution to the equation?
The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.
Let the speed of the boat in still water be x and the speed of water be y.
A boat traveled 504 miles downstream and back. The trip downstream took 14 hours. Then the equation will be
x + y = 504 / 14
x + y = 36 ...1
The trip back took 21 hours. Then the equation will be
x - y = 504 / 21
x - y = 24 ...2
Add equations 1 and 2, then the value of x will be
2x = 36 + 24
2x = 60
x = 30 miles per hour
Then the value of y will be
30 - y = 24
y = 6 miles per hour
The speed of the boat in still water will be 30 miles per hour and the speed of the current will be 6 miles per hour.
More about the solution of the equation link is given below.
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Answer:
The speed of the boat in still water is 30 mph, and the speed of the current is 6 mph.
Step-by-step explanation:
Let's say b is the speed of the boat in still water, and c is the speed of the current.
Distance = rate × time
Going downstream:
504 = (b + c) × 14
36 = b + c
Going upstream:
504 = (b − c) × 21
24 = b − c
Two equations, two variables. Solve with substitution or elimination. To use elimination, add the equations together.
60 = 2b
b = 30
Plug into any equation to find c.
36 = b + c
36 = 30 + c
c = 6
The speed of the boat in still water is 30 mph, and the speed of the current is 6 mph.
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C=2√A
Where A= area
C=25.13
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3+4+5=12
So there is 3 green cups, you would do 5/12
So the answer would be 5/12
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2. Explanation: Since you need to move the decimal three places to the right in order to get an answer of 20, every time you move the decimal point to the right, you are multiplying the number by 10. (Example: 0.02 x 10 = 0.2) (0.2 x 10 = 2) (2 x 10 = 20).
3. Hope this helped :)
10^2 = 2.0
10^3 = 20.0
So, the answer is 3.