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Lina20 [59]
3 years ago
11

What is the value of

rt{81} " align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
vovangra [49]3 years ago
7 0
9

9x9= 81 hope this helps
Digiron [165]3 years ago
3 0

Answer:

81

=

9

⋅

9

then the square root of

√

81

=

9

.

Because the double multiplication for the same sign is always positive, the square root is also valid with the other sign

81

=

(

−

9

)

⋅

(

−

9

)

then

√

81

=

−

9

and we can say that

√

81

=

±

9

.

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PLSSS HELPPP !!!At least how many square feet of canvas are needed to make one cover? (Use
andreyandreev [35.5K]

Answer:

154ft.2 witch is d

Step-by-step explanation:

i just know

6 0
2 years ago
Joshua is 1.45 meters tall. At 2 p.m., he measures the length of a tree's shadow to be 31.65 meters. He stands 26.2 meters away
Lena [83]

Answer:

The height of the tree=8.42 m

Step-by-step explanation:

We are given that

Height of Joshua, h=1.45 m

Length of tree's shadow, L=31.65 m

Distance between tree and Joshua=26.2 m

We have to find the height of the tree.

BC=26.2 m

BD=31.65m

CD=BD-BC

CD=31.65-26.2=5.45 m

EC=1.45 m

All right triangles are similar .When two triangles are similar then the ratio of their corresponding sides are equal.

\triangle ABD\sim \triangle ECD

\frac{AB}{EC}=\frac{BD}{CD}

Substitute the values

\frac{AB}{1.45}=\frac{31.65}{5.45}

AB=\frac{31.65\times 1.45}{5.45}

AB=8.42m

Hence, the height of the tree=8.42 m

6 0
3 years ago
1. Evaluate
Dmitry_Shevchenko [17]
<span>1. Evaluate (2-2^3)^3-4x(-4)
</span>
(2-2 x^{3} )^{3} -4x(-4)=8-8x^{9} -16x<span>
</span>                                   =8(1-x^{9} -2x)<span>

2. Compute
-453+(-5.34)=-453-5.34
                    =-458.34
-56+27.4=-28.6

3. Use <, >, or =

9 > -8
-12 < -3
-4 > -7</span>
6 0
3 years ago
The midpoint M of the line segment AB is (-3,7). If the coordinate of B is (5,-1), what is the coordinate of the point A?
sleet_krkn [62]

Answer:

Coordinate of Point A is (-11, 15)

Step-by-step explanation:

M -- (-3, 7)

B -- (5, -1)

Therefore, (5 + x)/2  = -3

x = -11

(-1 + y)/2 = 7

y = 15

Therefore Point A is (-11, 15)

8 0
3 years ago
Read 2 more answers
If x varies directly as y and x = 74 when y = 10, find x when y = 4.
Fittoniya [83]

Answer:

The value of x is 21 .

Step-by-step explanation:

We are given that x varies directly as y

--- A

We are given that x = 7 and y = 28

Substitute the values in A

7 = 28k

Now equations becomes :  

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Hence The value of x is 21 .

#Learn more:

Find the value of y for a given value of x, if y varies directly with x.

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Step-by-step explanation:

5 0
2 years ago
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