There were 42 people at the conference
        
             
        
        
        
Answer:

Step-by-step explanation:
This question is illustrated using the attachment and will be solved using cosine formula

<em>Let the strawberry side be s, the Green beans be b and the pumpkins be p.</em>
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The cosine formula in this case is:

Where



The equation becomes



Collect Like Terms


Using quadratic formula:

Where







 or
 or 
 or
 or 
 or
 or 
But length can not be negative.
So:

 
        
             
        
        
        
Answer:
C. he did not multiply the numerator by 2
Step-by-step explanation:
To find an equivlent fraction, you must multiply the numerator and denominator by the same thing.
 
        
                    
             
        
        
        
Answer:
1. One valuable information NASA learnt from the sample of olivine is that some parts of Mars had been dry over a long period of time.
2. The two materials are:
i. Oxygen supply.
ii. Air temperature and pressure regulation.
Step-by-step explanation:
NASA went on a research mission on mars and observed the Nansen crater, and discovered the olivine in the crater. It was learnt from the sample of olivine that parts of Mars had been dry over a long period of time.
2. The Personal Life Support System is a part of the suit used by astronauts to create an artificial habitat condition for their body system. This suit contains some materials that preserve their lives in space. The major materials in the suit are; oxygen (for breathing purpose) and air temperature and pressure regulation.
 
        
             
        
        
        
Answer:
x = 20 
y = 100
Step-by-step explanation:
To figure out x do this.
3x + 2x = 7x - 40 (collect like terms)
5x = 7x -40 (subtract 7x on both sides)
-2x = -40 (divide by -2 on both sides)
x = 20
Plug in to get y
Since 7x - 40 and y are vertical they equal the same amount
7(20) - 40 = y (multiply 7 by 20)
140 - 40 = y (collect like terms)
100 = y
Hope this helps ya! Keep smiling!