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Mathematics

1 answer:

AnnyKZ [126]3 years ago

6 0

Answer:

Answer down below!

Step-by-step explanation:

The simple way to do this is shown below:

Since two tires cost $74, you know that if you multiply that by two, you'll get your four.

74 x 2 = 148

Four tires will cost you $148

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Step-by-step explanation:

The average is the total of the scores divided by 5.

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in a proportional relationship the ratio y/x is constant. Show that this ratio is not constant for the equation y=a-14

Colt1911 [192]

To show that the ratio $\frac{y}{x}$ is not constant for the function $y=a-14$ we only need to evaluate this function at 2 points and then show that the ratio is not the same for those two points. Note that here $a$ represents $x$ .

To find the counter examples here, I will use the values $a=20$ and $a=28$ . For $a = 20$ , the equation tells us that the output is

$y=20-14=6$ . For this value of $a$ the point is point is $(20,6)$ . The ratio $\frac{y}{x} =\frac{6}{20}$ . For the $a=28$ , $y=28-14=14$ . For this value of $a$ the point is $(28,14)$ . The ratio $\frac{y}{x} =\frac{14}{28} =\frac{1}{2}$ . Clearly this ratio is not constant for all ordered pairs.