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3 years ago

Evaluate 5x^2 + 2 for x = -1.

Mathematics

2 answers:

iogann1982 [59]3 years ago

6 0

Answer:

Step-by-step explanation:

If x = -1 then we need to plug that into the equation.

5(-1)^2 +2

Then solve for the first part

5(1) + 2

Then multiply.

5 + 2

Then add

Hope this helped!

Verdich [7]3 years ago

5 0

Answer:

its 6

Step-by-step explanation:

5−12+2

=5−1+2

=4+2

--lvr

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shutvik [7]

Answer:

x= 60.1 degrees

Step-by-step explanation:

The triangle forms a right angle triangle

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Hypotenuse of the triangle = 15

We know the opposite side and the hypotenuse

So we use trigonometric formula sin(x)

$sin(x) = \frac{opposite}{hypotenuse}$

$sin(x) = \frac{13}{15}$

When we move 'sin' to the other side it becomes 'sin^-1'

$x=sin^{-1}(\frac{13}{15})$

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Answer:

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Step-by-step explanation:

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I don't know the answer but have a site that helps me with math, its called

Step-by-step explanation:

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