Answer:
20. y = 3·3^x
21. y = (1/3)^x
Step-by-step explanation:
These exponential functions can be written in the form ...
y = a·b^x
where a is the value of y when x=0, and b is the common ratio between terms that have x different by 1.
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20. The ratio is 9/3 = 3; the multiplier is 3 (the value of y when x=0), so the function is ...
y = 3·3^x
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21. The ratio is (1/3)/1 = 1/3; the multiplier is 1, so the function is ...
y = (1/3)^x
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<em>Alternate solution</em>
Each of these can be written in a more compact form:
20: y = 3^(x+1)
21: y = 3^(-x)
Answer:
The probability that the system is a Wii console is 0.46
Step-by-step explanation:
Probability expresses the possibility of an occurrence of an event. The probable outcomes for the event is called sample space.
For the given question,
Number of Sony Playstations = 6
Number of Nintendo Wii consoles = 5
Total number of games on the shelve = 11
Probability that the game selected is Wii console implies the possibility of picking one out of the 5 consoles.
pr(the system is a Wii console) = 
= 0.4555
≅ 0.46
The probability that the system is a Wii console is 0.46.
20%, just calculate the fraction of mystery books and multiply that by 100 %
Answer:
25
Step-by-step explanation:
f(5)=5(5-1)+5
f(5)=5(4)+5
f(5)=20+5
f(5)=25
Answer:
Step-by-step explanation:
Divide 1 7/10 by 3/5 to see if the quotient is greater than 2. If it's not, you can't get 2 scarves out of it. If it is, then you can get 2 scarves out of it and have whatever the remainder is as left-over. Before we divide, let's change that 1 7/10 into an improper fraction since it will be easier to work with.
1 7/10 = 17/10
Now we can divide:

The rule for dividing fractions is that you bring up the lower fraction and flip it to multiply, so that looks like this:
×
To simplify before we multiply, we can reduce between the 5 and the 10 and have smaller numbers to deal with:
×
The product there is 
So the answer you want from your choices is
"Yes, because the quotient of Fraction 1 and 7 over 10 [division sign]Fraction 3 over 5 is 2 and 5 over 6", third choice