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3 years ago

If 4x+3y=10 and 2x+7y=20, determine a coefficient for x that makes the equation below true.

Mathematics

1 answer:

pishuonlain [190]3 years ago

8 0

4x + 3y = 10 means 8x + 6y = 20
2x + 7y = 20 as well so
2x + 7y = 8x + 6y
-6x + y = 0

coefficient = -6

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3 years ago

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4 years ago

Does the function g(x) = -2x2 + 10x + 2 have a minimum or a maximum? Identify its value.<br> +

Hitman42 [59]

Answer:

(5/2, 29/2), and this represents a maximum

Step-by-step explanation:

g(x) = -2x^2 + 10x + 2 is a quadratic function with coefficients {-2, 10, 2}.

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3 years ago

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aev [14]

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Step-by-step explanation:

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3 years ago

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faltersainse [42]

Answer:

$(a)\ \mu_y = 1125$

$(b)\ \sigma_y = 300$

Step-by-step explanation:

Given

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$\sigma_x = 20$ -- Standard deviation of T-shirts

$Rate = \$ 15$

Solving (a): The mean of the revenue $(\mu_y)$

To solve this, we use:

$\mu_y = Rate * \mu_x\\$

This gives:

$\mu_y = 15 * 75$

$\mu_y = 1125$

Solving (b): The standard deviation of the revenue $(\sigma_y)$

To solve this, we use:

$\sigma_y = \sqrt{Rate^2 * \sigma_2^2}$

This gives:

$\sigma_y = \sqrt{15^2 * 20^2}$

$\sigma_y = \sqrt{90000}$

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7 0

3 years ago