Answer:
The sum is equal to 
Step-by-step explanation:
we know that
The formula to calculate the sum is equal to

In this problem
-----> number of terms
a1 is the first term

an is the last term

substitute

B or D, I forgot whether the open circle or the circle is the equal to one, if I had to guess I'd say B
Answer:
-1 is the inverse of 16 modulo 17.
Step-by-step explanation:
To find : An inverse of 16 modulo 17 i.e.
?
Solution :
First we find the GCD of (17,16) using Euclid's algorithm,

Remainder is 1.
Which means, GCD(17,16)=1
Using back substitution we get,



i.e. -1 is the inverse of 16 modulo 17.
On comparing with 
The value of x=-1.
Answer: 3-
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given
The recipe calls for 2 Pounds of ground pork and 3.5 pounds of ground beef
Suppose x is the cost of ground pork
So, the cost of ground beef is 
The total cost of meat is 
The total cost can also be written as

So, the cost of ground pork is 