Plz i need in 5 mins simplify each expression. your answer should contain only positive exponents. a ) −16^0 b )m^3n^−9

a) Any number to the 0 power equals 1, but since the base is negative and not in parentheses, it will be -1.

b) This is the same as (negative exponents go to the denominator) which simplifies to .

Hope this helps!!

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this