Use the equation for the area of a triangle:
where A = area, h = height of the triangle, and b = base of the triangle.
You know that h=18m and A=99
. Plug those values into the equation and solve for b, the base.
The base is 11m long.
Answer. 332.78
Step-by-step explanation:
I subtracted and as awesome its right trust me.
Remark
You need to do some trig to get the final answer. There is no way around it. You can however, solve the first part with the Pythagorean Theorem.
Step One
Find AB
AB^2 = DB^2 + AD^2
AB^2 = 7.5^2 + 4.9^2
AB^2 = 56.25 + 24.01
AB^2 = 80.26
AB = sqrt(80.26)
AB = 8.9588
Step Two
Move to the triangle on your right. Find x
Tan(C)= opposite / adjacent
Tan(55.8) = AB/adjacent
Tan(55.8) = 8.9588/ x Multiply both sides by x
x * tan(55.8) = 8.9588 Divide by tan(55.8)
x = 8.9588/tan(55.8)
x = 6.09
Answer: A
1. 7
2. 10
3. 31
4. 5
5. -1
6. 15
7. 11
8. 29
9. -3
10. 8
11. -5
12. 13
13. 31
14. 0
15. 11
16. 6
17. 20
18. -1
19. 25
20. 12
21. 0
The answer is:
x=-8
Because:
If you pick a number(-8) to fill in the equation written below
5x+20+5x=5x-20
After applying the -8 to x you get
-40+20-40=-40-20
When you simply the both sides you get
-60=-60
And that’s right -60 is equal to -60!
