Answer:
Here's what we know:
n + d = 20 (there are a total of 20 nickels and dimes)
.05n + .1d = 1.4 (total change equals $1.40)
There are a couple of ways to solve this. You can go the elimination method by multiplying the second equation by an amount to get rid of a variable, or we can go substitution by isolating a variable in the first equation. I'll go with elimination in this case:
-10(.05n + .1d = 1.4) this will cause the d-variable to equal 0:
n + d = 20
-.5n - d = -14
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.5n = 6
n = 12
Now that we know n, we can solve for d:
12 + d = 20
d = 8
Check:
.05 * 12 + .1 + 8 = 1.4
.6 + .8 = 1.4
1.4 = 1.4
:)
Number of shares bought = 8,000
Purchase price =$7.29
Total purchase price = 8000*7.29 = 58,320
Sale price = $10.31
Total selling price = 8000*10.31 = 82,480
Total Gain = 82,480 -58,320
Total Gain = 24,160
Percentage Gain = Total gain/ Total Purchase price *100
Percentage Gain = 24,160/58,320 * 100 = 41.43%
Percentage Gain = 41.43% (Rounded to two decimals)
The answer is Yes, this is a valid inference because he took a random sample of the neighborhood. Hope it help!
The dog snored nine times. 1/3 of an hour is every 30 minute interval. 30 min + 30 min = 1 hour. Multiply this x3, and the answer is nine. A simpler way of thinking about this is 3 x 3 or 3 squared.
Answer:
165 years old
Step-by-step explanation:
For now let his age be = x
According to the question,
4x - 500 = 160
4x = 160 + 500
4x = 660
x = 660 / 4
x = <u>165 years old</u>
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(He is tooooo wise)
<u>Hope it helps!</u>
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