1) given
2) def of midpoint
3) substitution property of equality
Answer:
x=27
Step-by-step explanation:
Triangles always add up to 180 so 90+63+x=180 (we know 90 is one of the degrees because of the triangles next to it) Now do some algebra: 90+63+x=180 add 90+63 together> 153+x=180 minus 153 from both sides it'll be x=27
Answer:

Step-by-step explanation:
In order to get the answer to this question you will have to put the scientific notations into their number form then multiply, then change back into scientific notation form.

Turn the notations into their number form:

The exponent is positive so move the decimal point to the right:

Do the same with the second notation:

Since the exponent is positive move the decimal point to the right:

Now multiply:

Now turn the number into scientific notation:


Hope this helps.
The correct answer would be A. -10.6.