Find all constants a such that the vectors (a, 4) and (2, 5) are parallel.

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Step-by-step explanation:

Two vectors and are parallel to one another if and only if the ratio between their corresponding components are equal:

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Equivalently:

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For the two vectors in this equation to be parallel to one another:

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Solve for :

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would be the only valid value of ; no other value would satisfy the equation.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation:

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation: