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3 years ago

Evaluate the expression 4/15÷x+0.4 for x if: x=1, x=4/9, x=1 1/3. Solve for each X. I need help Will give brainliest!

Mathematics

1 answer:

AfilCa [17]3 years ago

8 0

Answer:

4/15 ÷ x + 0.4

When x = 1

4/15 ÷ 1 + 0.4

x = 2/3

When x = 4/9

4/15 ÷ 4/9 +0.4

x = 1

When x = 1 ⅓ = 4/3

4/15 ÷ 4/3 + 0.4

x = 3/5

Hope this helps.

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Cannot create sample

Step-by-step explanation:

We are given the following in the question:

4, -2, -6, 19, 6

Formula:

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

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$Mean =\displaystyle\frac{21}{5} = 4.2$

Sum of squares of differences = 0.04 + 38.44 + 104.04 + 219.04 + 3.24 = 364.8

$s^2 = \dfrac{364.8}{4}} = 91.2$

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New sample:

4, -2, -6, 19, 6, 4.2

$Mean =\displaystyle\frac{25.2}{6} = 4.2$

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3 years ago

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Masja [62]

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3 years ago

Help with math homework please!

yuradex [85]

The correct answer is: [C}: " 3 ⁻ ¹ " .

___________________________

Note: " 3 = 3 ¹ " .

→ " 3 ⁻ ¹ = 1 / (3 ¹) = 1 /3 = $\frac{1}{3}$ " .

_______________________

Let us consider the remaining answer choices:

_______________________

Choice [A}: " ( - 1)³ " .

Note: " ( - 1)³ " = " { - 1 * - 1 * - 1 } " = " -1 " .

→ " -1 " ≠ " $\frac{1}{3}$ " .

→ So; Choice [A} is INCORRECT.

___________________________

Choice [B]: " (- 3)¹ " .

Note: " ( - 3)¹ " = " -3 " .

→ " -3 " ≠ " $\frac{1}{3}$ " .

→ So; Choice [B] is INCORRECT.

___________________________

→ The correct answer is: [C]: " 3 ⁻ ¹ . "

__________________________

Hope this was helpful!

Best of luck to you!

__________________________

8 0

3 years ago