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dusya [7]
3 years ago
11

While working on his science fair project, Julian noticed changes in the cultures he was growing. He noticed that the cultures w

ere increasing daily as displayed in the chart.
The rate is

1 day to 4 cultures
2 days to 9 cultures
3 days to 16 cultures
4 days to 25 cultures
If the increase continues at the same rate, how many cultures will be present on the ninth day?
Mathematics
1 answer:
jarptica [38.1K]3 years ago
8 0
The answer is:  " 100 cultures " .
_______________________________________________
   Take the number of the day we are at (from the beginning;  in this case, "9" (for "Day 9").
_________________________________________________
 Then add "1" to that number (in this case, " 9 + 1 = 10" .
_________________________________________________
Then, take that value (in this case, "10"); and "square" that value ; (in this case;  " 10² = 10 * 10 = 100 .   This is the answer.
__________________________________________________
The answer is:  " 100 cultures " .
__________________________________________________
<u>Note</u><u>:</u>  We get this steps by noticing the trend from the information provided.
___________________________________________________

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Answer:

$8,500 in CDs; $11,500 in bonds

Step-by-step explanation:

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From the details of the amounts, we get this equation.

b = c + 3000

We have a system of equations in two unknowns.

c + b = 20000  Eq. 1

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Since Eq. 2 is already solved for b, we will use the substitution method to solve the system of equations.

Substitute b in Eq. 1 with c + 3000.

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2c = 17000

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Now substitute c = 8500 in Eq. 2 and solve for b.

b = c + 3000

b = 8500 + 3000

b = 11500

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Step-by-step explanation:

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