Answer:
15+2a
Step-by-step explanation:
7+a+8+a=15+2a
 
        
             
        
        
        
Solution :
The data is normally distributed.
The standard deviation is 18 days
Here the data is normally distributed and 54 days is 3 days of standard deviation.
Therefore, the percentage of the births that would be  within the 54 days of the mean
 within the 54 days of the mean  length is given by :
 length is given by :
= P( -3 < Z < 3)
= 0.9544
= 95 %
Therefore, about 95% of the births would be  within 54 days of the men
 within 54 days of the men  length.
 length. 
 
        
             
        
        
        
Given:
x is a number between 8 and 12 exclusive.
To find:
The value of x.
Solution:
It is given that x is a number between 8 and 12 exclusive. It means the value of x lies between 8 and 12 but 8 and 12 are not included.

The whole numbers for  range are 9, 10, 11.
 range are 9, 10, 11.
Therefore, the values of x are 9, 10, 11 and the value of x in the form of inequality is  .
.
 
        
             
        
        
        
For large candles, the price is $10. They sold 42, we can say that. 42*10 is the total price or revenue without the cost to make the candles included. The cost to make the candles is $x. So we can say profit for large candles = (420 - 42x).
For small candles. The price is $5 and 56 are sold. The cost is again $x. So the profit for small candles is (280 - 56x).
So the total profit for part one of your question is (420 - 42x) + (280 - 56x).
In part to we are told that large candles cost $5 and small candles cost $3. Substituing this into are expression gives (420 - 42(5)) + (280 - 56(3)). This gives us $322. So the total profit is $322.
        
             
        
        
        
Answer:
130
Step-by-step explanation:
50 (given angle) minus 180 (what the angle should add up to)
50-180 = Measure of angle 1 (130)