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Anettt [7]
3 years ago
12

Let f(x)=x^2-8x+5. Find f(-1)

Mathematics
1 answer:
polet [3.4K]3 years ago
3 0
F(x) = x² - 8x + 5

f(-1) = (-1)² - 8*(-1) + 5

         = 1 + 8 + 5 = 14

f(-1) = 14.
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A convex polygon has Choose...<br> sides when the interior angle sum is 1980º.
Viefleur [7K]

Answer:

13 sides.

Step-by-step explanation:

(n - 2) = 1980 / 180 = 11.

n = 13

When the sum of the interior angles is 1980 degrees, the convex polygon will have 13 sides.

i hope this helps and is right! p.s. i really need brainliest :)

3 0
3 years ago
Find the rectangular coordinates of the point (squareroot3, pi/6)
svet-max [94.6K]

Answer:

The rectangular coordinates of the point are (3/2 , √3/2)

Step-by-step explanation:

* Lets study how to change from polar form to rectangular coordinates

- To convert from polar form (r , Ф) to rectangular coordinates (x , y)

 use these rules

# x = r cos Ф

# y = r sin Ф

* Now lets solve the problem

∵ The point in the rectangular coordinates is (√3 , π/6)

∴ r = √3 and Ф = π/6

- Lets find the x-coordinates

∵ x = r cos Ф

∵ r = √3

∵ Ф = π/6

∴ x = √3 cos π/6

∵ cos π/6 = √3/2

∴ x = √3 (√3/2) = 3/2

* The x-coordinate of the point is 3/2

- Lets find the y-coordinates

∵ y = r sin Ф

∵ r = √3

∵ Ф = π/6

∴ y = √3 sin π/6

∵ sin π/6 = 1/2

∴ y = √3 (1/2) = √3/2

* The y-coordinate of the point is √3/2

∴ The rectangular coordinates of the point are (3/2 , √3/2)

6 0
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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6 0
3 years ago
Write the number equal to 5 tens and 13 ones
cluponka [151]
10 ones = 1 ten

6 tens 3 ones
63
3 0
3 years ago
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