When two fractions have the same numerators, the one with the smaller denominator is the greater fraction.

$30 < 32 \Rightarrow \frac{22}{30} > \frac{22}{32}$

So Kelvin is right.

8 0

4 years ago

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Chenoa starts with $250 in her savings account. Each month she adds $15.

Digiron [165]

Chenoa starts with $250 in her saving account and each month she adds $15 in her saving account.

Therefore, we obtain a sequence as:

250, (250+15), (250+15+15),...

250, 265, 280,....

So, we get the first term ( $a_{1}$ ) as 250.

Now , we can clearly observe that the first term is 250 and second term is obtained by adding 15 to the first term that is 265 and so on.

Similarly in an arithmetic progression, last term is $a_{n}$ and its previous term is $a_{n-1}$ .

Similarly, $a_{n}$ will be obtained by adding 15 to its previous term $a_{n-1}$ .

So, $a_{n}=15+a_{n-1}$ and $a_{1}$ =250.

Therefore, Option C is correct.

6 0

3 years ago

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There are 9 different colors of paint to choose from. Out of the 9 colors, how many ways can 4 different colors be chosen?

gregori [183]

This is the concept of combination, the number of ways 4 different color can be chosen from 9 different colors will be:
9C4
=(9!)/(4!(9-4)!)
=362,880/(24×120)
=362,880/2880
=126
thus the number of ways is 126 ways

4 0

3 years ago

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