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Elan Coil [88]
3 years ago
13

What is the value of x 3x + 4 when x = -2

Mathematics
2 answers:
lora16 [44]3 years ago
6 0

Answer

-2

Step-by-step explanation:

because you replace x with "-2" so it would be "3(-2) + 4" then solve that

Yuliya22 [10]3 years ago
4 0

Answer:

x = -2

Step-by-step explanation:

1. Evaluate the function when x=-2.

This means to plug in -2 anywhere you see x in the equation.

3(-2)+4

2. Simplify and solve.

-6+4

x = -2

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How many solutions does the pair of equations y = 0 and y = -5 have?
Crank

Answer: None

Step-by-step explanation:

y=0 and y=-5 don't have any solutions. When you ask if a pair of equations have a solution, that means there is an intersection of the equations. The 2 equations will meet somewhere, and that is the solution. To find the solution, you set the equations equal to each other.

0≠-5

It is obvious that 0 and -5 are not equal to each other. Therefore, there is no solution. Also, y=0 and y=-5 are horizontal lines that are parallel to each other. They will never meet, which means there will be no intersection. No intersection means no solutions.

8 0
3 years ago
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NemiM [27]

Answer:

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8 0
2 years ago
How many terms are there in the following expression:
sweet [91]
3 terms

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7 0
3 years ago
Determine if the given differential equation is exact (e^2y-y cos xy)dx+(2xe^2 y-cos xy+2y)dy=0
rewona [7]
\dfrac\partial{\partial y}\left[e^{2y}-y\cos xy\right]=2e^{2y}-\cos xy+xy\sin xy

\dfrac\partial{\partial x}\left[2xe^{2y}-y\cos xy+2y\right]=2e^{2y}+y\sin xy

The partial derivatives are not equal, so the equation is not exact.
7 0
4 years ago
(0,-1)(5-2)what is the slope
ruslelena [56]

The formula of a slope m:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (0, -1) and (5, -2). Substitute:

m=\dfrac{-2-(-1)}{5-0}=\dfrac{-2+1}{5}=-\dfrac{1}{5}

<h3>Answer: The slope = -1/5</h3>
8 0
3 years ago
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