<span>b. 4+12÷2=4+6=10
c. (20–5)•3=15•3=45</span>
The square root of 51.84 is 7.2
Answer:

Step-by-step explanation:
Given

Required
Determine the inverse function
Start by replacing f(x) with y

Swap the positions of y and x

Make y the subject: <em>Add 4 to both sides</em>


Make y the subject: <em>Divide through by 2</em>
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Replace y with f-1(x)

Answer:314
Step-by-step explanation: 3.14 x 100 = 314
Move the decimal two times to the right because there is two zeros
Sum = ADDITION SO ... 11 + 12 = 23.