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3 years ago

Evaluate the expression -x + -x +5y +6y if x = 5 and y = -2

Mathematics

2 answers:

igomit [66]3 years ago

8 0

Answer:

Step-by-step explanation:

Plug in x and y first. -5 + -5 + 5(-2) + 6(-2). -5 +-5= -10. -10 + 5(-2) + 6(-2). 5 times negaitve 2 is -10 and 6 times negaitve 2 is negative 12. -10 + -10 + -12 =-32

KiRa [710]3 years ago

3 0

Answer:

The answer is 9,034.

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3√x -2/x^2 please show step by step of differentiation before combining the terms.

EastWind [94]

Answer:

Step-by-step explanation:

Before we differentiate, let us assign a variable to the function. Let y be equal to the function i.e let y = 3√x -2/x²

In differentiation if $y = ax^{n}$ , then $\frac{dy}{dx} = nax^{n-1}$ where n is a constant and dy/dx means we are differentiating the function y with respect to x.

Applying the formula o the question given;

$y= 3\sqrt{x} -2/x^2\\y = 3{x}^\frac{1}{2} - 2x^{-2} \\\\$

On differentiating the resulting function;

$\frac{dy}{dx} = \frac{1}{2}*3x^{\frac{1}{2}-1 } - (-2)x^{-2-1} \\\\\frac{dy}{dx} = \frac{1}{2}*3x^{-\frac{1}{2}} + 2x^{-3}\\ \\\frac{dy}{dx} = \frac{1}{2}*{\frac{3}{x^{\frac{1}{2} } }} + \frac{2}{x^{3} } \\\\\frac{dy}{dx} = {\frac{3}{2x^{\frac{1}{2} } }} + \frac{2}{x^{3} }\\\\\frac{dy}{dx} = {\frac{3}{2\sqrt{x} }} + \frac{2}{x^{3} }$

To combine the terms, we will add up by finding their LCM.

$\frac{dy}{dx} = {\frac{3}{2\sqrt{x} }} + \frac{2}{x^{3} }\\\frac{dy}{dx} = \frac{3x^3+4\sqrt{x} }{2x^{3} \sqrt{x}}$

3 0

4 years ago

What is the mean absolute deviation 4 2 2 of the following set of data? 10

mina [271]

Answer:

mean absolute deviation would be 2.75

Step-by-step explanation:

mean: 4 + 2 + 2 + 10 = 18/4 = 4.5

4.5 - 4 = 0.5

4.5 - 2 = 2.5

4.5 - 10 = 5.5

mean absolute deviation: 0.5 + 2.5 + 2.5 + 5.5 = 11/4 = 2.75

~hope this helps~

please mark me the brainliest, I would highly appreciate it :)

5 0

3 years ago

For your job, you often fly between Seattle and Miami. The distance between these cities is 2,724 miles. You earn a free flight

Alborosie

So you would multiply 2,724 by two since it is a round trip. Then you would divide 43,000 by that number to get the number.

7 0

4 years ago

Read 2 more answers

Liz types 180 words in three minutes. At that rate how many minutes does it take her to type 1260 words

mash [69]

Answer:

21 minutes

Step-by-step explanation:

you first have to find how many words she writes in one minute. you do this by dividing 180/3=60. after that divide 1260 by 60 = 21 minutes.

4 0

3 years ago

Match each polynomial expression to its additive inverse.

fomenos

Answer:

Step-by-step explanation:

To find the additive inverse of polynomial expression, flip the sign of each term.

6x² ----> -6x²

-x -----> +x

-2 -----> +2

Additive inverse:

-6x² + x + 2

6 0

4 years ago