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mars1129 [50]
3 years ago
14

The present shown below is a cube. Find the surface area of the present.

Mathematics
2 answers:
Kruka [31]3 years ago
3 0
To answer this you need to multiply 20 by 20. this gives 400cm
or you can also square 20
olga2289 [7]3 years ago
3 0
^ their answer is true , they told you everything you need to solve it
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A ship is sailing on the sea. It travels 50 miles at 60° to the horizontal. Then the ship travels 90 miles at 30° to the horizon
pav-90 [236]

Answer:

(25\sqrt{3}+45)\ miles

Step-by-step explanation:

we know that

The total vertical distance (total miles North) traveled is equal to

d=50sin(60^o)+90sin(30^o)

Remember that

sin(60^o)=\frac{\sqrt{3}}{2}

sin(30^o)=\frac{1}{2}

substitute

d=50(\frac{\sqrt{3}}{2})+90(\frac{1}{2})

d=(25\sqrt{3}+45)\ miles

7 0
4 years ago
Which expression is equivalent to n+n+n+n <br> PLS ANSWER ASAP DUE AT 9:15
abruzzese [7]

Answer:

B

Step-by-step explanation:

4n = n + n + n + n

7 0
3 years ago
Read 2 more answers
I'm Stuck, please help.
GarryVolchara [31]
Hi there!

Let me help you out a bit here. What we need to do is subtract the area of the smaller square from the area of the larger square. To do this, we first need to find the length of one of the larger sides. Since the outer polygon is a square, we can use the 45-45-90 relationship to determine that each side of the larger square is equal to 9 \sqrt{2}. Next, we can do the same thing for the smaller square, determining that one outer side of the smaller square is equal to 4 \sqrt{2}. To figure out the area of both squares, we need to square each of the outer lengths. This gives us 162 for the bigger square and 32 for the smaller square. Now, all we need to do is subtract 32 from 162. This gives us a value of 130cm^2 for the shaded area.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
5 0
4 years ago
miracle is playing a board game with a friend. She needs 20 points to win. She currently has -10 points. She wants to know the d
kogti [31]

20-30=-10

[(-10+10)+10+10]=20

4 0
3 years ago
Read 2 more answers
3. What are the factors of<br> 9x2 - 30x + 25?
vaieri [72.5K]

{(3x)}^{2}-2(3x)(5)+{5}^{2}

−2(3x)(5)+5

2

{(3x-5)}^{2}

4 0
3 years ago
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