Answer:
1,500,000,000
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$20
Step-by-step explanation:
15/3=5 which means that for every guest attending Carla's retirement party it must cost her $5 each. 
Therefore if 4 guests come to the party it must mean 4(5) which is 20.
Hence $20
 
        
                    
             
        
        
        
Answer:
   -675
Step-by-step explanation:
The sum can be broken into parts that you know. Here, one of those parts is the sum of numbers 1 to n. That sum is given by n(n+1)/2.

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Another way to do this is to realize the sequence of numbers is an arithmetic sequence with a first term of 65 and a last term of 67-2·75 = -83.
The sum of an arithmetic sequence is found by multiplying the number of terms by their average value. Their average value is the average of the first and last terms.
The average value of those 75 terms is (65 +(-83))/2 = -9, so their sum is ...
   75(-9) = -675
 
        
             
        
        
        
Answer:
7
Step-by-step explanation:
sqrt(49)
What number times itself = 49
7*7 = 49
and 
-7*-7 = 49
Given the choices  choose 7
 
        
                    
             
        
        
        
Answer:
6%.
Step-by-step explanation:
We have been given that Tammy deposited $520 in the bank account that earns simple interest every year after 5 years she had earned $156.
To find the interest rate we will use simple interest formula.

I= Interest.
P= Principal amount.
r=Annual interest rate (in decimal form).
T= Time in years.
We have been given that I=156, T=5, P=520
Upon substituting our values in above formula we will get,




Let us multiply 0.06 by 100 to convert annual interest rate in percentage.

Therefore, the annual interest rate was 6%.