3.264 x 10^1 hope this helps :)
<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:
C
Step-by-step explanation:
The average speed can be obtained by adding the distances together and dividing by the total amount of time.
The total distance the man traveled from A to D is the addition of the distance from A to B plus the distance from B to C plus the distance from C to D. This is mathematically equal to 145 + 160 + 115 = 420 miles.
Dividing 420 miles by 6 = 70 miles per hour
Answer:
6
Step-by-step explanation:
Look at the coordinates A(2,4) to A’(12,24)
You multiply the coordinates by 6 to get A’B’C’
Answer: C, 2 3/5
Step-by-step explanation:
- Let's start by making these fractions easily subtractable
7 1/5 = 6 6/5 (1 is equal to 5/5 so we take that from the 7 and add it to the fraction)
4 3/5 remains the same because this is what we are subtracting
7 1/5 - 4 3/5 will be subsituted for 6 6/5 - 4 3/5=? because it's equivilant
I like to break this into two parts to make it less complicated, fraction then number
- Fraction: 6/5-3/5=3/5
- Whole Number 6-4=2
- Combine back into a mixed number
This will give you the proper fraction for the result of your equation
2+3/5=2 3/5
2 3/5