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2 years ago

What is f(-1)=x^2-8x-12

Mathematics

1 answer:

xz_007 [3.2K]2 years ago

7 0

Answer:

- 3

Step-by-step explanation:

Assuming f(x) = x² - 8x - 12

To evaluate f(- 1) substitute x = - 1 into f(x)

f(- 1) = (- 1)² - 8(- 1) - 12 = 1 + 8 - 12 = 9 - 12 = - 3

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W divide 3+6 = 2 I need help I don’t know how to get the answer

tatuchka [14]

Assignment: $\bold{Solve \ Equation: \ \frac{w}{3+6}=2\quad }$

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Answer: $\boxed{\bold{w=18}}$

<><><><><><><>

Explanation: $\downarrow\downarrow\downarrow$

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Note: $\bold{Fraction \ Bar \ "/" \ = \ \div}$

[ Step One ] Multiply Both Sides By 9

$\bold{\frac{9w}{3+6}=2\cdot \:9}$

[ Step Two ] Simplify

$\bold{w=18}$

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$\bold{\rightarrow Mordancy \leftarrow}$

6 0

3 years ago

A stone is dropped from the edge of a roof, and hits the ground with a velocity of -185 feet per second. How high (in feet) is t

34kurt

Answer:

The height of the roof is 534.8 feet.

Step-by-step explanation:

Let h be the height of the roof.

We know the formula

$v^2-u^2=2gh$

Since, the stone is dropped from the edge of the roof hence, the initial velocity should be zero. Thus, u = 0

$v^2-0=2gh\\h=\frac{v^2}{2g}$

Now, we have

v = -185 feet per second

g = 32 feet per square second

On substituting these values, we get

$h=\frac{(-185)^2}{2\times 32}\\\\h=534.8$

The height of the roof is 534.8 feet.

4 0

3 years ago

Read 2 more answers

What is the weight, in Newtons, of a person on Earth whose mass is 90 kilograms? Gravity near the Earth's surface is 9.8 m/s2.

valentinak56 [21]

Answer:

W = 882 N

Step-by-step explanation:

Given that,

The weight of a person, W = 90 kg

The value of acceleration due to gravity, g = 9.8 m/s²

We need to find the weight of the person on Earth. The formula for the weight of an object is given by :

W = mg

Substitute all the values,

W = 90 kg × 9.8 m/s²

W = 882 N

So, the weight of the person is equal to 882 N.

8 0

2 years ago

PLEASE ANSWER ASAP!

Blizzard [7]

Step-by-step explanation:

Let the length of the bridge be x

Since, triangles ADF and BCF are similar, ratio of their corresponding sides are equal.

Therefore,

60 / 144 = 40 / x

X (length of the bridge) = <u>96 m</u>

4 0

3 years ago

What is the value of tan D ?

4vir4ik [10]

Answer:

12/5

Step-by-step explanation:

Tan D = opp/adj = EF/DE = 12/5

8 0

3 years ago

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