Use PEMDAS form. (Parentheses, exponents, multiplication, division, addition, subtraction.) You will first solve -2-8 which is -10, then finish with 9 + (-10), or 9-10, which is -1. The answer is -1.
The answer is the fourth choice
The sum of AB and BC is 180 degrees. So 13x - 10 = 180. 13x = 190.
x = 190/13
When dividing this expression, you have to remember two
rules:
<span>1.
</span>In dividing constants, you divide it just like
the normal division of number.
<span>2.
</span>In dividing variables, you have to subtract the
exponent of the denominator to the exponent of the denominator.
9a^3b^5 / 3ab^2
3a^(3-1)b^(5-2)
3a^2b^3
