A= hᵇb
2
hope that helped at all.
Answer:
Rn-222
Step-by-step explanation:
this decay takes specified step therefore Rn-222is not a decaying process
Answer:
Step-by-step explanation:
3.242424.....
This number can be written as 3 + 0.242424....
We convert the decimal part into fraction
Let x= 0.242424......
Multiply both sides by 100
100x = 24.2424....
x= 0.2424.....
------------------------------------- (subtract it)
99x = 24
Divide both sides by 99
So x= 24/ 99
simplify the fraction
3.242424... can be written as 3 + 0.242424....
Replace the fraction for decimal
So final answer is
If points A, E and C are colinear, then they lie on the same line. The same statement you can say about points B, F and D.
1. Consider triangles AOC and BOD. In these triangles:
- AO≅OB (given);
- CO≅OD (given);
- ∠AOC≅∠BOD (as vertical angles).
Thus, ΔAOC≅ΔBOD by SAS Postulate (If any two corresponding sides and their included angle are the same in both triangles, then the triangles are congruent). Corresponding parts of congruent triangles are congruent, then
- AC≅BD;
- ∠ACO≅∠BDO;
- ∠CAO≅∠DBO.
Since angles ACO and BDO are alternate interior angles between lines AE and BF with transversal CD and these angles are congruent, then lines AE and BF are parallel.
This gives you that
2. Consider triangles ECO and FDO. In these triangles
- ∠CEO≅∠OFD (previous proof);
- CO≅OD (given);
- ∠ECO≅∠ODF (previous proof).
Therefore, ΔECO≅ΔFDO by AAS Postulate (if two angles and the non-included side one triangle are congruent to two angles and the non-included side of another triangle, then these two triangles are congruent). Then CE≅FD.
3. Note that
Since AC≅BD and CE≅DF, then AE=AC+CE=BD+DF=BF.
Answer:x
x=−15+5y
x-5y=-15
Step-by-step explanation:
