It's 2/5. hope it will help you!
Step-by-step explanation:
135 = <2 + 86 [exterior angle of triangle is equal to the sum of its oppsite two interior angles]
or, <2 = 135 - 86
so, <2 = 49°
A scatter plot shows the relationship between two sets of data.
Answer:
15.

16. 10 ml of 20% saline and 40 ml of 10% saline
Step-by-step explanation:
A chemist takes x ml of 20% saline and y ml of 10% saline. In total, he takes
x + y ml that is 50 ml, so

There are
ml of salt in x ml of 20% saline and
ml of salt in 10% saline. There are
ml of salt in 50 ml of 12% saline. Thus,

15. We get the system of two equations:

16. Solve this system. From the first equation:

Substitute it into the second equation:
