Use Guauss-jordan elimination to solve the following linear system. 5x - 2y = -2 -x + 4y = 4
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Answer
Find out the total cost for their dinner.
To prove
As given
For dinner, Abelita chooses the Italian salad that costs $3.99 before tax.
Franco chooses the fettuccini alfredo that costs $7.17 before tax.
Total cost of the dinner before tax = $ 3.99 + $7.17
= $ 11.16
As given
If the sales tax is 5 percent .
5 % is written in the decimal form.
= 0.05
5% tax on the dinner cost = 0.05 × 11.16
= $0.558
Total cost of the dinner = Total cost of the dinner before tax + tax cost
= $11.16 + $0.558
= $ 11.718
= $11.72 (approx)
Therefore the total cost for their dinner is $ 11.72 (approx)