Answer:
Trust me, I know my stuff.
Step-by-step explanation:
Use the diagonals to make two triangles. They will be the longest sides. We know two sides and an angle are congruent. By use of the Side Angle Side congruence conjecture, we know the triangles are congruent. Corresponding parts of congruent triangles are congruent, therefore, the diagonals must be congruent. Good luck.
Answer:
No, a compound containing 12 atoms of sodium and 15 atoms of oxygen could not be sodium carbonate. When its ratio of atoms is reduced to the lowest terms, it is not the same as sodium carbonate. 4:5 ≠ 2:3
Step-by-step explanation:
Use ratios to solve this problem.
In sodium carbonate, the ratio for the number of atoms for sodium to oxygen (sodium:oxygen) is 2:3.
Check if the ratio for the compound with the ratio 12:15 is equal to 2:3.
Reduce the ratio 12:15 to lowest terms, just like how you would reduce a fraction. Find the GCF (greatest common factor). The left and right sides are both divisible by 3.
12/3 = 4
15/3 = 5
The ratio in the compound is 4:5.
4:5 ≠ 2:3
Since the ratios are not the same, the compound is not sodium carbonate.
-4x + 3(2x - 5) = 31 (use distributive property to remove parentheses)
-4x + 6x - 15 = 31 (combine like terms)
2x - 15 = 31 (add 15 to both sides)
+15 +15
2x = 46 (divide both sides by 2)
x = 23
Answer:
10x +6y - 14
Step-by-step explanation:
3x - 2y = 13x + 4y = 14
3x = 13x + 6y = 14
-10x = 6y = 14
10x + 6y - 14
Answer:
The answer is A.
Step-by-step explanation:
Hope this helped! :)
