the second slide is A. 22
and the last one is x=81    z=99  and y=68 
hope this helps
 
        
             
        
        
        
Answer:
7.9.
Step-by-step explanation:
Use the Pythagorean Theorem.
√((-5)^2 + (6)^2 + (-1)^2) = √62 = 7.87 = 7.9.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Given
k + 1 even numbers
Required
Their sum
This question will be solved using the sum of nth term of an AP

Where
a = the first even number

n = number of terms

d = difference between consecutive even numbers

So, the expression becomes:




Factorize 4 + 2k




 
        
             
        
        
        
For A substitute it with 1 for x squared, because is has a coefficient of 1, -5 for B because the coefficient of -5x is -5, and 1 for C because there is no variable connected to is, and one is the coefficient.