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Yanka [14]
3 years ago
6

What is the surface area of the cube below ?

Mathematics
2 answers:
dusya [7]3 years ago
6 0

Answer:

B

Step-by-step explanation:

Since a cube has 6 sides, the surface area of a cube is 6 times the area of one of the sides. Therefore:

SA=6\cdot 9^2=6\cdot 81= 486\text{ units}^2

Hope this helps!

Andrei [34K]3 years ago
3 0

Answer:

486

Step-by-step explanation:

there are 6 sides in a cube

according to the picture, the length and width of each side is 9

multiply 9 by 9 for 1 side=     81

there are 6 sides

so multiply 81 by 6=     486

so your answer is b 486.

pls mark brainliest

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Someone please help! find x round to the nearest tenth! trigonometry!​
TEA [102]

Answer:

<h2>x = 745.5 ft</h2>

Step-by-step explanation:

Look at the picture.

Use sine:

sine=\dfrac{opposite}{hypotenuse}

We have a measure of the angle and length of the opposite:

\alpha=28^o,\ opposite=350\ ft

\sin28^o\approx0.4695

Substitute:

\dfrac{350}{x}=0.4695

\dfrac{350}{x}=\dfrac{4695}{10000}            <em>cross multiply</em>

4695x=3500000           <em>divide both sides by 4695</em>

x=\dfrac{3500000}{4695}\to x\approx745.5

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3 years ago
What is the slope of the line through (-9,6) and (-3, 9)?
Artyom0805 [142]
To find slope, y2-y1/x2-x1
9-6/-3-(-9)=
3/6= 1/2
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Y=1/2x.
3 0
3 years ago
Help me please thank yiu
Citrus2011 [14]

Answer:

Step-by-step explanation:

I think it is C

5 0
3 years ago
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WILL GIVE BRAINLIEST IMMEDIATELY!!! INSTANT BRAINLY!! PLS HELP
lys-0071 [83]

Answer:

The two column proof is presented as follows;

Statement                   {}                  Reason

1. Parallelogram SUPN \overline {SR}⊥ \overline {UN} {}   1. Given

and \overline {MP}⊥ \overline {UN}

2. ∠SRU = ∠PMN = 90°   {}                 2. Definition of perpendicular lines

3. ∠SRU ≅ ∠PMN            {}                 2. Definition of congruency

4. \overline {UP} ║ \overline {SN}                      {}                4. Opposite sides of a parallelogram are                                            {}                                                               congruent

5. ∠SNR ≅ ∠PUM             {}               5. Alternate interior angles are congruent

6. \overline {UP} ≅ \overline {SN}                      {}               6. Opposite sides of a parallelogram are                                            {}                                                              congruent

7. ΔPMU ≅ ΔSRN                 {}           7. By AAS rule of congruency

By the Angle-Angle-Side (AAS) rule of congruency, we have that, if two angles and a corresponding adjacent side (∠SRU ≅ ∠PMN, ∠SNR ≅ ∠PUM, \overline {UP} ≅ \overline {SN})  of two triangles (ΔPMU and ΔSRN) are congruent, then the the two triangles are also congruent (ΔPMU ≅ ΔSRN)

Step-by-step explanation:

5 0
3 years ago
What is<br> 3x-y=9<br> 2x-y=7
svet-max [94.6K]

Answer:

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Step-by-step explanation:

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But here, we would be using the substitution method.

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Getting y from equation 2, we have

-y= 7-2x

Multiply both sides by -

y= 2x-7 Equation 3

Substituting y for 2x-7 in equation 1, we have

3x- (2x-7)=9

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y= 2(2)-7

y= 4-7

y= -3

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3 years ago
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