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AleksandrR [38]
4 years ago
15

Evaluate the expression when a=3. a^2+12

Mathematics
2 answers:
melomori [17]4 years ago
7 0

3^{2} + 12 = 9 + 12 = 21

The answer is 21.

klemol [59]4 years ago
4 0

Answer:

The correct answer is 21.

Step-by-step explanation:

To solve this problem, we simply substitute 3 for a in the expression.

Given the expression,

a^2 + 12

we should replace "a" with 3, as denoted by the problem, giving us:

(3)^2 + 12

Now, we simplify using the order of operations.  PEMDAS tells us that we should simplify what is in the parentheses first because it has an exponent.

9 + 12

Now, we can just add the two remaining terms together, giving us:

21

Therefore, the answer is 21.

Hope this helps!

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Answer:


Step-by-step explanation:

This is not a linear relationship, it doesn't have a set increase or uniform slope and it seems more like an exponential or quadratic curve to me when I graph it. As you can see you cant draw a straight line through the data points so it cannot be a linear relationship.

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The price of a watch was increased by 10% to £660. What was the price before the increase?
Bad White [126]

Answer:

£600

Step-by-step explanation:

First take if 110% equals to £660 what about 100%

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3 0
3 years ago
Devon owes his parents $60. He does weekly chores to earn money to pay them back. The
jarptica [38.1K]

The rate of change which is also the ratio of the rise to the run value of a graph.

  • Rate of change = 7.5
  • Steeper slope if rate of change = $10
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Rate of change :

Rise / Run

From the graph :

y2 = - 60 ; y1 = 0 ; x2 = 0 ; x1 = 8

Rise = y2 - y1 = (-60 - 0) = - 60

Run = x2 - x1 = (0 - 8) = - 8

Rate of change = - 60 ÷ - 8 = 7.5

Hence, Devon's debt changes by 7.5 with respect to x

B.).

If Devon paid $10 every week instead of $7.5

  • He would be able to pay his debt more quickly
  • Hence, leading to a steeper slope on the graph

C.)

If Devon only had owed $40

  • Debt will be lesser, meaning that repayment time will be lower
  • At the same number of weeks, the graph will have a steeper slope.

Therefore, rate of change gives information about the slope of a graph, higher rate of change values results in steeper slopes.

Learn more : brainly.com/question/18904995

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irina [24]

Answer:

C

Step-by-step explanation:

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