Solve by Completing the Square
2x^2+4-5=7

x = 2 or -2

Step-by-step explanation:

2x2+4−5=7

Step 1: Simplify both sides of the equation.

2x2−1=7

Step 2: Add 1 to both sides.

2x2−1+1=7+1

2x2=8

Step 3: Divide both sides by 2.

2x2

2

=

8

2

x2=4

Step 4: Take square root.

x=±√4

x=2 or x=−2

x=2 or x=−2

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total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98