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4 years ago

13

Cara is grocery shopping and needs chicken and steak for the barbecue she is having on Saturday. Chicken is 2.99 per pound and s

teak is 5.79 per pound. She knows she wants to spend exactly 50 on meat. If C represents pounds of chicken and s represents pounds of steak, which equation represents this situation

1 answer:

vodka [1.7K]4 years ago

8 0

2.99* c+5.79* s= 50

2.99c+ 5.79s =50

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Kitty [74]

Answer:

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Step-by-step explanation:

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3 years ago

Three cell phones towers can be modeled by the points X(6,0), Y(8,4), and Z(3,9). Determine the location of another cell phone t

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Answer:

The location of the new cell phone tower is $(h,k) = (3,4)$ , and the equation of the circle is $x^{2}+y^{2} -6\cdot x - 8\cdot y = 0$ .

Step-by-step explanation:

The location of the cell phone tower coincides with the location of a circunference passing through the three cell phone towers. By Analytical Geometry, the equation of the circle is represented by the following general formula:

$x^{2} + y^{2}+A\cdot x + B\cdot y +C = 0$ (1)

Where:

$x$ - Independent variable.

$y$ - Dependent variable.

$A$ , $B$ , $C$ - Circunference constants.

Given the number of variable, we need the location of three distinct points:

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Then, we have the following system of linear equations:

$6\cdot A + C = -36$ (2)

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The solution of this system is:

$A = -6$ , $B = -8$ , $C = 0$

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$A = -2\cdot h$ (5)

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Where:

$h$ , $k$ - Coordinates of the center of the circle.

$r$ - Radius of the circle.

If we know that $A = -6$ , $B = -8$ and $C = 0$ , then coordinates of the center of the circle and its radius are, respectively:

$h = -\frac{A}{2}$

$k = -\frac{B}{2}$

$r = \sqrt{h^{2}+k^{2}-C}$

$h = 3$ , $k = 4$ , $r = 5$

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3 years ago

What is the difference in the surface area of two cubes, one with edge 15 and one with an edge of 12

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Remark

A cube has six sides, all of them equal. The formula for 1 side is s^2. The formula for all six = 6s^2.

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Step Three

Find the difference

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The difference is area = 486 units^2 <<<<< Answer

There is a slightly shorter way. Take out the common factor of 6

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Answer:

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Lames:KRIPS,BD GD<br> GOOD:BLOODS

steposvetlana [31]

Umh… yes ig heh

Agreed

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