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fiasKO [112]
3 years ago
10

F(x) = x ^ 2 - x , what is f(- 5) ?

Mathematics
1 answer:
Ahat [919]3 years ago
3 0

Answer:

f(-5)=20

Step-by-step explanation:

f(x)=x^2-x

=f(-5)=-5^2-5

=f(-5)=25-5

=f(-5)=20

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I need help, please answer A and B.
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Answer:

a. 81 square inches

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Step-by-step explanation:

The area of all 5 squares combined is 405 square inches. This is 5 times the area of 1 square. 405/5 = 81. The area of 1 square is 81 square inches.

Since this is a square, the sides are equal. Thankfully the area of 1 square is a perfect square so the length of one side of the square is a full number, which is 9. All of the squares are congruent as shown in the diagram so we simply add every length together (there are 12 sides, each side is 9 inches).

12*9 = 108 and that is the perimeter.

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3 years ago
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Y = (x - 1) to the second power + 2
Nikolay [14]
Y = (x - 1)² + 2
y = (x² - x - x + 1) + 2
y = (x² - 2x + 1) + 2
y = x² - 2x + (1 + 2)
y = x² - 2x + 3
x² - 2x + 3 = 0
x = <u>-(-2) +/- √((-2)²  4(1)(3))</u>
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x = <u>2 +/- √(4 + 12)</u>
                2
x = <u>2 +/- √(16)
</u>             2<u>
</u>x = <u>2 +/- 4
</u>           2<u>
</u>x = 1 <u>+</u> 2
x = 1 + 2      x = 1 - 2
x = 3            x = -1
y = x² - 2x + 3
y = (3)² - 2(3) + 3
y = 9 - 6 + 3
y = 3 + 3
y = 6
(x, y) = (3, 6)
or
y = x² - 2x + 3
y = (-2)² - 2(-1) + 3
y = 4 + 2 + 3
y = 6 + 3
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5 0
4 years ago
what is the volume of a cylinder in cubic feet with a height of 12 feet in a base diameter of 12 feet
pantera1 [17]

Answer:

1357.17 cubic feet

Step-by-step explanation:

The volume of a cylinder is

\pi {r}^{2} h

We know the height is 12, and the radius is simply half our diameter, which in this case is

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plug these two numbers into our formula and we have found our volume.

6 0
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