Mathematics: The cost of 2 tv and 3 dvd player is $1421. the cost of 1 dvd is half of the tv. what s the cost of the tv

The cost of 2 tv and 3 dvd player is $1421. the cost

Ответ:

Mlmyers81

31.12.2021

The cost of one tv is double than cost of one DVD;

The cost of 2 tv is 4 times more cost one DVD ;

The cost of 2 tv and 3 DVD player is 7 times more cost one DVD ;Then, 1 DVD cost 1421 ÷7 = 201 $ ;
1 tv cost = 2 * 201 = 402 $ ;

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Ответ:

arryahc

14.07.2020

Mathematics

$y = -\frac{3}{7}x + 3$

Step-by-step explanation:

In order to find the equation of a line, we need to first find the slope. Slope is represented by the formula:

$\frac{y_{2}-y_{1} }{x_{2} - x_{1} }$

where (x1, y1) and (x2, y2) are point on the line. In this case, we can use the points (0, 3) and (7, 0):

$\frac{0-3}{7-0} = -\frac{3}{7}$

The point (0, 3) is the y-intercept, so given an equation in the form y = mx + b, 3 would be b and we already calculated the slope, which is m. We can plug these values in to get:

$y = -\frac{3}{7}x + 3$

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The cost of 2 tv and 3 dvd player is $1421. the cost of 1 dvd is half of the tv. what's the cost of the tv

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