Please please please help me

5

Step-by-step explanation:

Since these triangles are similar, corresponding sides will have a constant ratio. Therefore, the ratio of 2 to n must be the same as 6 to 15, or 4 to 10. You can therefore set up the following equation:

Multiply both sides by 2:

Hope this helps!

Step-by-step explanation:

-8.3 + 9.2 - 4.4 + 3.7

= -8.3 + 9.2 + (-4.4) + 3.7            {Additive inverse}

= -8.3 + (-4.4) + 9.2 + 3.7            {Commutative Property}

= [ -8.3 + (-4.4] + [ 9.2 + 3.7]       {Associative property}

=  - 12.7 + 12.9

= 0.2