Answer: two of them are positive and negative
Step-by-step explanation: because there is -30 and -25 that is negative and 1 and 20 that are positive
The answer is 19 all you have to do is add them together
If an angle of one triangle is congruent to the corresponding angle of another triangle and the lengths of the sides including these angles are in proportion, the triangles are similar. the remaining sets of angles will be congruent and the remaining corresponding sides will be in proportion.
Answer:
B, E
Step-by-step explanation:
Given expression
![-2.5(1-2n)-1.5n](https://tex.z-dn.net/?f=-2.5%281-2n%29-1.5n)
First, use the distributive property:
![-2.5(1-2n)-1.5n\\ \\=-2.5\cdot 1-2.5\cdot (-2n)-1.5n\\ \\=-2.5+5n-1.5n](https://tex.z-dn.net/?f=-2.5%281-2n%29-1.5n%5C%5C%20%5C%5C%3D-2.5%5Ccdot%201-2.5%5Ccdot%20%28-2n%29-1.5n%5C%5C%20%5C%5C%3D-2.5%2B5n-1.5n)
Use distributive property once more:
![-2.5+5n-1.5n\\ \\=-2.5+n(5-1.5)](https://tex.z-dn.net/?f=-2.5%2B5n-1.5n%5C%5C%20%5C%5C%3D-2.5%2Bn%285-1.5%29)
So, option E is correct.
Now,
![-2.5+n(5-1.5)\\ \\=-2.5+n\cdot 3.5\\ \\=-2.5+3.5n](https://tex.z-dn.net/?f=-2.5%2Bn%285-1.5%29%5C%5C%20%5C%5C%3D-2.5%2Bn%5Ccdot%203.5%5C%5C%20%5C%5C%3D-2.5%2B3.5n)
Thus, option B is correct