Answer:
A - 5 square root of 3
Step-by-step explanation:
Take one of the triangles and use the pythagorean theorem. A^2 + B^2 = C^2
Hence,
5^2 + x^2 = 10^2
25 +x^2 = 100
25 +x^2 -25 = 100-25
x^2 = 75
Take the square root of both sides. . .
x = 5 square root of 3
Multiplying is repeated addition, and a positive times a negative equals a negative, so you're only going to be needing the side with negatives that finally get to zero. First, find 0, then take it 6 numbers back, -6. repeat the step until you have three loops. It should equal -18. Hope this helps :)
Simplifying in the bracket first then following the rules of operations-4+8-[16x1+4]
-4+8-[20]
-16
1) given 6x = 4x + 140
2) subtract 4x from both sides => 6x - 4x = 4x - 4x + 140
=> 2x = 140
3) divide both members by 2 => 2x / 2 = 140 / 2
=> x = 70
4) Answer: x = 70