2 years ago

Find the solutions of this system of equations 10x-5y=-20 7x-5y=-26

Mathematics

1 answer:

OverLord2011 [107]2 years ago

8 0

Answer:

i think $25.00

Step-by-step explanation:

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4 times 4 = 16

16 times 4 = 64

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1 year ago

A rational function can have infinitely many x-values at which it is not continuous. True or False. If false, explain

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Colin is painting figurines. He spends 20 minutes painting each figurine. After painting for 60 minutes, he still has 9 more fig

miss Akunina [59]

Answer:

$f(t) = -0.05t +12$

Step-by-step explanation:

To solve this problem we must pay attention to the following data supplied:

- f It is the number of figurines that remain to be painted.

- t amount of time, in minutes, that Colin spends painting

- Colin takes 20 minutes painting each figurines.

- After painting 60 min, he still has 9 figurines left. f (60) = 9

If he takes 20 minutes painting 1, it means that in 60 minutes he has painted 3 and he has 9 left.

Then, at the beginning he has 9 +3 figurines to be painted.

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With these two points we can find the function:

If m is the slope of the line, then:

$m = \frac{y_2-y_1}{x_2-x_1}\\\\m = \frac{9-12}{60-0}\\\\m = -0.05\\\\f (t) = -0.05t + c$

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Finally the formula is:

$f(t) = -0.05t +12$

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