An expression is given. 3 × (8 + 2) ÷ 2

Which statement is true about the parentheses in this expression?
A. The parentheses indicate that 8 + 2 should be solved first.
B. The parentheses indicate that 8 + 2 should be solved last.
C. The parentheses indicate that 2 ÷ 2 should be solved last.
D. The parentheses indicate that 3 × 8 should be solved first.

A

Step-by-step explanation:

because everything in the brackets should always be solved first

BODMAS

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places