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3 years ago

K km jkggbkk no klkkjhffd

Mathematics

2 answers:

yuradex [85]3 years ago

6 0

You have to use your formal which is
SA=2lw+2lh+2hw
Which will give you your answer of 34

Ksivusya [100]3 years ago

3 0

Your answer will give you 34

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A 9.85 m ladder is placed against a wall. The height to the top of the ladder is 5 m more than the distance between the wall and

Dafna1 [17]

Given:

Length of the ladder = 9.85 m

The height to the top of the ladder is 5 m more than the distance between the wall and the foot of the ladder.

To find:

The height to the top and the distance between the wall and the foot of the ladder.

Solution:

let x be the distance between the wall and the foot of the ladder. Then the height to the top of the ladder is (x+5).

Pythagoras theorem: In a right angle triangle,

$Hypotenuse^2=Base^2+Perpendicular^2$

In the given situation, hypotenuse is the length of ladder, i.e., 9.85 m. The base is x m and the height is (x+5) m.

Using the Pythagoras theorem, we get

$(9.85)^2=x^2+(x+5)^2$

$97.0225=x^2+x^2+10x+25$

$0=2x^2+10x+25-97.0225$

$0=2x^2+10x-72.0225$

Here, $a=2, b=10,c=-72.0225$ . Using the quadratic formula, we get

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

$x=\dfrac{-10\pm \sqrt{(10)^2-4(2)(-72.0225)}}{2(2)}$

$x=\dfrac{-10\pm \sqrt{676.18}}{4}$

Approximating the value, we get

$x=\dfrac{-10\pm 26}{4}$

$x=\dfrac{-10+26}{4},\dfrac{-10-26}{4}$

$x=\dfrac{16}{4},\dfrac{-36}{4}$

$x=4,-9$

Distance cannot be negative so $x\neq -9.$

Now we have $x=4$

$x+5=4+5$

$x+5=9$

Therefore, the base is 4 m and the height is 9 m.

5 0

3 years ago

I am confused on how to do this? please help!

IceJOKER [234]

You would take random numbers preferable smaller ones such as -1,0,1,2
You would put those in the place of x
Then you would square the value of x. After that you subtract 4. Whatever you come out with is your y value. Then you put the x value on the x axis and from that point count up or down to the number you need on the y axis. Together that would be your point

6 0

3 years ago

Brad and Stella volunteer to help at the party. Brad volunteers at the prize table and Stella

IgorC [24]

If the prize table takes a break every 20 minutes it should eventually get a break in an hour

The refreshment table get a break every 30 minutes so it will take a second break in an hour

At 60 minutes they will be able to have a break together

4 0

3 years ago

Read 2 more answers

Which classification best describes the following system of equations? 3x+6y-12z=36, x+2y-4z=12, 4x+8-16z=48

Andrews [41]

(1) 3x+6y-12z=36
(2) x+2y-4z=12
(3) 4x+8y-16z=48

The first equation (1) is the second equation (2) multiplied by 3:
(2) x+2y-4z=12→3(x+2y-4z=12)→3x+6y-12z=36 (1)

The third equation (3) is the second equation (2) multiplied by 4:
(2) x+2y-4z=12→4(x+2y-4z=12)→4x+8y-16z=48 (3)

The equations are linearly dependent, Then the system of equations is dependent, and then consistent too.

5 0

4 years ago

What's the answer ?<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B25%20%5Ctimes%209%7D%20" id="TexFormula1" title=" \sqr

snow_tiger [21]

Answer:

$\sqrt{25 \times 9}$

$\sqrt{5² \times 3²}$

±(5*3)

±15 is a required answer.

7 0

3 years ago