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Sever21 [200]
2 years ago
8

2-1+5+10+20-5-1-9+9-1+?

Mathematics
2 answers:
hodyreva [135]2 years ago
8 0
<h3>2-1+5+10+20-5-1-9+9-1</h3><h3>=32-3</h3><h3>=29</h3>
konstantin123 [22]2 years ago
8 0

Answer:

15 is the answer sure na sure sa answer sure

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An isosceles trapezoid has base angles equal to 45 and bases of lengths 6 and 12. Find the area of the trapezoid.
swat32

Answer:

First option: 27 square units.

Step-by-step explanation:

The formula for calculate the area of a trapezoid is:

A=\frac{h}{2}(B+b)

Where h is the height, B the larger base and b the smaller base.

Observe the figure of the trapezoid called ABCD. The length of the larger base (AB) is 12 units and the lenght of the smaller base (CD) is 6 units, but the height h is unknown, so you need to find it.

You can observe in the figure that two equal right triangles are formed, whose opposite side is the height "h". If you calculate the opposite side of one of those triangles, you will  obtain the height of the trapezoid.

For this, you can use the identity tan\alpha=\frac{opposite}{adjacent}.

Identify the opposite side, the adjacent side and the angle \alpha:

opposite=h\\adjacent=\frac{12units-6units}{2}=3units\\\alpha=45\°

Substitute and solve for the height h:

tan(45\°)=\frac{h}{3}\\(3)(tan(45\°)=h\\3units=h

Finally substitute into A=\frac{h}{2}(B+b):

A=\frac{3units}{2}(12units+6units)=27units^2

8 0
2 years ago
Read 2 more answers
Previous<br> 11<br><br><br><br><br><br><br><br><br><br> Solve 2+16y=3x+4 for y.
Nata [24]

Answer:

y=3/16x + 1/8

Step-by-step explanation:

2+16y=3x+4

16y=3x+4-2

16y=3x+2

y= 3/16x + 1/8

5 0
3 years ago
WILL MARK BRAINLYIST <br> what is the top length of the missing piece
34kurt

Answer:

4 1/2

Step-by-step explanation:

6--------1/2

   /\

 4 1/2

7 0
2 years ago
Keisha bikes 5 miles on monday and m miles on tuesday. write two equivalent expressions for the total number of miles she bikes
Alex787 [66]
5+m=T
T-m=5

Those are equivalent equations.
8 0
3 years ago
Please help:
suter [353]

Answer:

A. 14:8 or 7:4

B. 14:6 or 7:3

C. 6:8 or 3:4

D. 6:28 or 3:14

Step-by-step explanation:

All you have to do is put the numbers in order and sometimes you can simplify it. It's pretty self-explanatory.

Hope this helps :)

5 0
3 years ago
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