A 15 ft long cable is connected from a hook to the top of a pole that has an unknown height. The distance from the hook to the base of the pole is 3 ft shorter than the height of the pole.



a. What can you use to find the height of the pole?
b. Write and solve a quadratic equation to find the height of the pole.
c. How far is the hook from the base of the pole?

A 15 Ft Long Cable Is Connected From A Hook To The Top Of A Pole That Has An Unknown Height. The Distance

Answers

Answer 1

Answer:

a) Pythagoras' Theorem: a² + b² = c²

(where a and b are the legs, and c is the hypotenuse, of a right triangle)

b) Given:

a = (x - 3)b = xc = 15

Substituting these values into the equation and rearranging:

⇒ (x - 3)² + x² = 15²

⇒ x² - 6x + 9 + x² = 225

2x² - 6x - 216 = 0

c) Solve  2x² - 6x - 216 = 0  by factorizing:

2x² - 6x - 216 = 0

⇒ x² - 3x - 108 = 0

⇒ x² - 12x + 9x - 108 = 0

⇒ x(x - 12) + 9(x - 12) = 0

⇒ (x - 12)(x + 9) = 0

⇒ x - 12 = 0 ⇒ x = 12

⇒ x + 9 = 0 ⇒ x = -9

As distance is positive, x = 12 only.

Therefore, the height of the pole is 12 ft.

So the distance from the hook to the base = 12 - 3 = 9 ft

Answer 2

We need x

Apply Pythagorean theorem

[tex]\\ \rm\Rrightarrow 15^2-x^2=(x-3)^2[/tex]

[tex]\\ \rm\Rrightarrow 225-x^2=x^2-6x+9[/tex]

[tex]\\ \rm\Rrightarrow 2x^2-6x-216=0[/tex]

[tex]\\ \rm\Rrightarrow x^2-3x-108=0[/tex]

[tex]\\ \rm\Rrightarrow (x+9)(x-12)=0[/tex]

[tex]\\ \rm\Rrightarrow x=-9,12[/tex]

Distance must be positive so x=12

Related Questions

Plsss if you can find x

Answers

Answer:

x=15

Step-by-step explanation:

Justin is 74 inches and casts a shawdow that is 102 inches long. At the same time , a tree casts a shadow that is 39 feet long. How tall is the tree to the nearest foot?

Answers

Answer:

The tree is 28 feet in height.

Step-by-step explanation:

This is a proportion problem. You need to keep the height of the objects on one side of the ratios and the length of the shadows on the other.

74 / x = 102/39           Cross Multiply

102x = 74*39              The inches as a unit cancel out.

102x = 2886               Divide by 102

x = 2886/102

x = 28.29 feet

PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS PLS

Answers

Answer:

B

Step-by-step explanation:

the other answers don't make sense

For which values of c does the quadratic equation x^(2)-2x+c=0 have No real roots?

Answers

Answer:

c > 1

Step-by-step explanation:

Given equation: [tex]x^2-2x+c=0[/tex]

General form of quadratic equation: [tex]ax^2+bx+c=0[/tex]

We can use the discriminant to determine the value of c for which the equation has no real roots.

[tex]b^2-4ac < 0\implies \textsf{no real roots}[/tex]

From the given equation:

[tex]a=1[/tex][tex]b=-2[/tex][tex]c=c[/tex]

Inputting these values into the discriminant formula:

[tex]\implies (-2)^2-4(1)(c) < 0[/tex]

[tex]\implies 4-4c < 0[/tex]

[tex]\implies 4 < 4c[/tex]

[tex]\implies 1 < c[/tex]

[tex]\implies c > 1[/tex]

Here

a=1b=-2

Discriminant must be less than 0

[tex]\\ \rm\Rrightarrow b^2-4ac<0[/tex]

[tex]\\ \rm\Rrightarrow (-2)^2-4(1)(c<0[/tex]

[tex]\\ \rm\Rrightarrow 4-4c<0[/tex]

[tex]\\ \rm\Rrightarrow 4(1-c)<0[/tex]

[tex]\\ \rm\Rrightarrow 1-c<0[/tex]

[tex]\\ \rm\Rrightarrow 1<c[/tex]

[tex]\\ \rm\Rrightarrow c>1[/tex]

Find the distance between the points (2,5) and (10,5).

Answers

Answer:

  8 units

Step-by-step explanation:

Points (2, 5) and (10, 5) have the same y-coordinate, so lie on the horizontal line y = 5. The distance between the points is the difference of their x-coordinates:

  10 -2 = 8

The points are 8 units apart.

__

If you plot the points on a graph, you can count the grid squares between them.

Can someone help me with this problem?

Answers

Answer:

Steak burgers = $4.50

Fries = $2.25

Step-by-step explanation:

Steak burgers = x; fries = y

-2 (3x + 2y = $18)

3  (2x + 3y = $15.75)

-6x - 4y = -36

6x + 9y = 47.25

5y = 11.25

÷5    ÷5

y = $2.25

3x + 2y = 18

3x + 2( 2.25 ) = 18

3x + 4.5 = 18

     -4.5   -4.5

3x = 13.5

÷3     ÷3

x = $4.50

I hope this helps!

PLEASE HELP!
1. Write an equation in slope
intercept form that passes
through (−1,2) and has a
slope of 2.
2.
Write the equation of the
line in slope intercept form
that contains the points
(4,−2) and (2,5).

Answers

Answer:

1.[tex]y=2x+4[/tex]
2.[tex]y=1x+3[/tex]

Step-by-step explanation:

Given the following questions:

Question one:

Point A = (-1, 2) = (x1, y2)
m = 2

To find the answer we will use the formula to find the slope intercept, substitute the values and then solve for b.

[tex]y=mx+b[/tex]
[tex]m=2[/tex]
[tex]x=-1[/tex]
[tex]y=2[/tex]
[tex]2=2(-1)+b[/tex]
[tex]2\times-1=-2[/tex]
[tex]2=-2+b[/tex]
[tex]-2+2=0[/tex]
[tex]2+2=4[/tex]
[tex]4=b[/tex]
[tex]b=4[/tex]
[tex]y=2x+4[/tex]

The slope intercept form of the line that passes through (-1, 2) and has a slope of 2 is "y = 2x + 4."

Question two:

Point A = (-1, 2) = (x1, y1)
Point B = (2, 5) = (x2, y2)

To find the slope intercept form we must first find the slope using the formula to calculate slope or rise over run.

[tex]m=\frac{y2-y1}{x2-x1}[/tex]
[tex]m=\frac{5-2}{2--1}=\frac{3}{3}[/tex]
[tex]3\div3=1[/tex]
[tex]m=1[/tex]

Now that we have the slope, we will use the formula for slope intercept, substitute the values, then solve for b.

[tex]y=mx+b[/tex]
[tex]m=1[/tex]
[tex]y=2[/tex]
[tex]x=-1[/tex]
[tex]2=1(-1)+b[/tex]
[tex]1\times-1=-1[/tex]
[tex]2=-1+b[/tex]
[tex]-1+1=0[/tex]
[tex]2+1=3[/tex]
[tex]3=b[/tex]
[tex]b=1[/tex]
[tex]y=1x+3[/tex]

The line that passes through the points (4, -2) and (2, 5) in slope intercept form is indeed "y = 1x + 3."

Hope this helps.

Julian forgot his bat when he left for baseball camp. His mother finds a box to ship it to him with the dimensions shown. If the bat measures 34 inches long, will the bat fit inside the box? Drag words to complete the statements about the diagonal of the base and the interior diagonal of the box. Words may be used once, more than once, or not at all.


Here are the words shorter than longer than equal to will not

The diagonal of the base of the box is

the bat.

The length of the interior diagonal of the box is

Answers

The bat will fit in the box if the length of the bat is less than the interior diagonal of the box

Julian's bat will not fit inside the box

How to determine if the bat can fit the box?

From the complete question, the dimension of the box is:

32 in by 6 in by 8 in

Start by calculating the diagonal (d) of the base of the box using the following Pythagoras theorem

[tex]d^2 = 6^2 + 8^2[/tex]

Next, calculate the length of the interior diagonal of the box.

[tex]L = \sqrt{32^2 + d^2\\[/tex]

This gives

[tex]L = \sqrt{32^2 + 6^2 + 8^2}[/tex]

Evaluate

[tex]L = 33.53[/tex]

The length of the bat (34 inches) is greater than the interior diagonal of the box (33.53 inches)

Hence, the bat will not fit inside the box

Read more about interior diagonal at:

https://brainly.com/question/654982

Find the perimeter of the parallelogram with these vertices.
(6,4),(-1, 4), (1, -5), (-6, -5)

Answers

Answer:

  34.6

Step-by-step explanation:

The perimeter of a plane geometric figure is the sum of its side lengths. This figure has two horizontal sides, so their length is easy to compute. It also has two diagonal sides, so the distance formula or Pythagorean theorem must be invoked to find their length.

The length of diagonal AC is ...

  d = √((x2 -x1)² +(y2 -y1)²)

  d = √((1 -6)² +(-5 -4)²) = √((-5)² +(-9)²) = √106 ≈ 10.3

The length of each horizontal segment can be found by counting grid squares or by finding the difference of x-coordinates.

  AB = 6 -(-1) = 6 +1 = 7

__

Two sides have length 10.3 and two sides have length 7, so the perimeter is ...

  P = 2(10.3 +7) = 34.6 . . . units

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS

Answers

Answer: BCE

Step-by-step explanation:

The angle has a vertex at N, so the correct options are B, C, and E.

a recipe requires 1/2 cup of flour for every batch of cookies. How many batches of cookies can be made with 4 1/2 cups of flour?

Answers

Answer:

You want to know how many cookies can be made using 5 1/2 cups of flour.

1 x 2 2

-------------- = -----

2 x 11 22

2/22 simplified is 1/11

So, You can make 11 cookies with 5 1/2 cups of flour.

Step-by-step explanation:

hope this will help you

please put me in brainlest

Find the value of each variable in the parallelogram. Please help!

Answers

Answer:

m = 35 , n = 110

Step-by-step explanation:

the opposite angles of a parallelogram are congruent , then

2m = 70 ( divide both sides by 2 )

m = 35

consecutive angles are supplementary, that is sum to 180° , then

n + 70 = 180 ( subtract 70 from both sides )

n = 110

Solution:

We know that:

In a parallelogram, opposite angles are equivalent

This means that:

70 = 2m

Divide 2 both sides to find m:

70 = 2m70/2 = 2m/2m = 70/2 = 35°

We can see that two angles measuring 70° and n° are a linear pair.

n + 70 = 180n = 180 - 70 = 110°

A woodworker wants to cut a board that is 436.2 inches long into 6 equal pieces. How long will each of the cut boards be?


answer with work.
will give brainliest

Answers

Answer:

72.7 inches

Step-by-step explanation:

436.2 / 6 = 72.7

If the a > 0 (positive) the graph opens
down or up

Answers

Answer:

Step-by-step explanation:

If a > 0 , then the parabola opens upward.

If a < 0, then the parabola opens downward.

PLS HELP!
solve by completing the square
x²+4x=8

Answers

Step-by-step explanation:

x²+4x=8

rearrange

x² + 4x - 8 = 0

half of 4 is 2

so

x² + 4x + 2² - 2² - 8 = 0

do x² + 4x + 2²

multiplies to give 4 adds to give 4

2+ 2

(x + 2)²

(x + 2)² - 2² - 8

(x + 2)² - 4 - 8

(x + 2)² - 12

(x + 2 + √12) (x + 2 - √12)

√12 = √4 * √3 = 2 √3

(x + 2 + 2√3) (x + 2 - 2√3)

EXPLAIN PLEASE!
In the figure below, A, B, C, and D are collinear (on the same line); AD is 26 units long, Ac is 19 units long; and BD is 22 units long. How many units long is BC?
A. 4
B. 6
C. 7
D. 15
E. 19 ​

Answers

Answer:

It is 19 units long.

Step-by-step explanation:

hey need your help again. It’s my latest question. Should be the first one. The question is: PLs help. VERY urgent. I will mark BRAINLIEST and 100 points on the line. Just fill in the blanks and answer the questions.

Valerie drives 400 meters up a hill that makes an angle of 20° with the horizontal. To the nearest tenth of a meter, what horizontal distance has she covered?
425.7 meters
375.9 meters
1169.5 meters
136.8 meters

Answers

Answer:

For this case we can model the problem as a rectangle triangle.

 We know:

 Length of the hypotenuse

 Angle between the base of the triangle and the hypotenuse.

 We want to know:

 Length of the base.

 For this we use the following trigonometric relationship:

 cos (15) = \frac{x}{500}cos(15)=500x

 Clearing x we have:

 x = 500 * cos (15) x = 482.96x=500∗cos(15)x=482.96

 Rounding to the nearest tenth of a meter:

 x = 483.0 mx=483.0m

 Answer:

 The horizontal distance she has covered is:

 x = 483.0 mx=483.0m

Bobby bought a ticket to see a local play that
was on sale for 40 percent off of the original price.
If the original price of the ticket was $39, what
was the sales price of the ticket?
O $15.60
O $25.00
O $54.60
O $23.40

Answers

Answer:

23.40

Step-by-step explanation:

Find 60% of 39, it's 23.4

23.40


discount
(39 x 40)/100 = 15.60

sales price

39-15.60

=23.40

find the definition to the match ​

Answers

Answer:

The definition of a match is a person or thing that is similar, equal to or suitable for another or a game or contest. An example of match is a shirt and jeans that are the same color of black. An example of match is two people with a similar sense of humor. An example of match is two people playing cribbage.

2. which of these units would be used to measure each of the following:
mm2, cm2, m2, km2. ​

Answers

Answer:

A. m2

b.km2

c.cm2

d.km2

e.m2

Step-by-step explanation:

mr cleans account was deleted ;-;

help its all in the screenshot v3

Answers

Answer:

it’s the first answer

What's the answer
[tex]4x {5}^{?} [/tex]

Answers

Answer:

Step-by-step explanation:

What's the question ?

What is the simplified form of (3s^2-2s+1)/(s^2-s+2)?
a. 3s+1
b. 3s+7
c. 3+s-5/s^2-s-2
d. 3+ s+7/s^2-s-2

Answers

Answer:

[tex]C\: or\: 3+\frac{s-5}{s^2-s+2}[/tex]

Step-by-step explanation:

[tex]\frac{\left(3s^2-2s+1\right)}{\left(s^2-s+2\right)}[/tex]

[tex]\frac{\left(3s^2-2s+1\right)}{\left(s^2-s+2\right)}:[/tex] [tex]\frac{\left(3s^2-2s+1\right)}{\left(s^2-s+2\right)}=3+1\frac{s-5}{s^{2}-s+2 }[/tex]

[tex]=3+\frac{s-5}{s^2-s+2}[/tex]

17 feet in 4 minutes

pls hurry

Answers

Answer:

4.25

Step-by-step explanation:

17/4

= 4.25


I hope it helps! Have a great day!

Muffin ^^

Answer:

4.25

Step-by-step explanation:

The answer is 4.25 because you have to divide the feet by min and when you do that you get 4.25.


I hope it helps! Have a great day!

bren~

please help me ASAP. ​

Answers

Answer:

A .

1. P

2. NP

3. P

4. NP

5. P

I hope u will like it

Answer:

A.

PNPPNPP

B. I don't Know

Step-by-step explanation:

What is the percentage of Chilean living in rural areas? Go to Population. More than 15% less than 15%. 5% 50%

Answers

Answer:

B. less than 15% just took the quiz and got a 100

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

PLEASE HELP ME FOR QUESTION 25

Answers

Step-by-step explanation:

Hopefully this helps you,
So if A= 70 degrees, C will also 70 degrees.
The parallelogram will always equal 360 degrees, so 70(2) = 140.
Then 360 - 140 = 220.
Then divide 220 by 2, so 220/2 = 110.
Therefore angles B and D are 110 degrees.
So your answer,
C = 70 degrees
B and D = 110 degrees

What property is this?

(3x+2)+16=3x+(2+16)

Answers

Answer:

It is Associative property :))

Step-by-step explanation:


write the ratios for sin A and cos A

Answers

sin a = opposite / hypotenuse. cos a = adjacent / hypotenuse.

Which of the following is equal to 4/7×11/15

Answers

Answer:

[tex]\frac{44}{105} [/tex]

Step-by-step explanation:

[tex] \frac{4}{7} \times \frac{11}{15} = \frac{4 \times 11}{7 \times 15} = \frac{44}{105} [/tex]

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