Answer:
<h3>The answer is 10 g/cm³</h3>
Step-by-step explanation:
The density of a substance can be found by using the formula
From the question
mass = 2 g
volume = 0.2 cm³
So we have
We have the final answer as
<h3>10 g/cm³</h3>
Hope this helps you
<h3>Answer:</h3>
2/15
<h3>Explanation:</h3>
There are 8C2 = 28 ways to choose 2 dimes from the 8 dimes in Annie's purse. There are 21C2 = 210 ways to choose 2 coins from the 21 coins in Annie's purse.
Of the 210 ways to choose 2 coins, 28 of the choices will result in 2 dimes being chosen. The probability of choosing 2 dimes is 28/210 = 2/15.
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<em>Comment on nCk</em>
The number of ways to choose k objects from n, when order does not matter, is ...
... n!/(k!(n -k)!)
For the computations above, we have ...
... 8C2 = 8·7/(2·1) = 28
... 21C2 = 21·20/(2·1) = 210
Answer:
x = -30/7
Step-by-step explanation:
-7x+3y=30
Let y=0
-7x +0 = 30
Divide by -7
-7x /-7 = 30/-7
x = -30/7
Answer:
p = 3
Step-by-step explanation:
Rearrange:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
p-(3000*(1/1000))=0
Step by step solution :
Step 1 :
1
Simplify ————
1000
Equation at the end of step 1 :
1
p - (3000 • ————) = 0
1000
Step 2 :
Equation at the end of step 2 :
p - 3 = 0
Step 3 :
Solving a Single Variable Equation :
3.1 Solve : p-3 = 0
Add 3 to both sides of the equation :
p = 3
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