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Anvisha [2.4K]
3 years ago
5

A coffee shop sells regular coffee in three sizes. The table shows the sizes of each regular coffee sold throughout the day. Wri

te and solve a system of equations to determine the price of each regular coffee.
a) bajo: $1.60; mediano: $1.82; grande: $2.00

b) bajo: $1.61; mediano: $1.77; grande: $2.03

c) bajo: $1.62; mediano: $1.80; grande: $2.03

d) bajo: $1.65; mediano: $1.79; grande: $2.07
Mathematics
1 answer:
kenny6666 [7]3 years ago
4 0

Answer:

c) bajo: $1.62; mediano: $1.80; grande: $2.03

Step-by-step explanation:

Insert numbers from the table into a linear equation (ignore time column) and use Cramer's Rule.

55x+53y+54z=299.12

17x+22y+25z=117.89

30x+23y+29z=148.97

x, bajo = 1.62

y, mediano = 1.8

z, grande = 2.03

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Step-by-step explanation:

I believe that there is an error in the function with the exponents, it must be:

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If this is the function that you need, then we must use the rational zero theorem. It says that if  a polynomial function, written in descending order of the exponents, has integer coefficients, then any rational zero must be of the form ± p/ q, where p is a factor of the constant term and q is a factor of the leading coefficient.

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In this case the constant term is 24 and then

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The factor of the leading coefficient is 2, thus

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The possible rational zeros for the function are

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