+0  
 
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37
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If w, x, y, and z are real numbers satisfying:

w+x+y = -2,

w+x+z = 4,

w+y+z = 19

x+y+z = 16

what is wx + yz?

 Jun 26, 2022
 #1
avatar+2222 
+1

Adding everything gives us: \(3(w+x+y+z) = 37\)

 

This means \(w + x + y + z = {37 \over 3}\).

 

Now, you can use this to solve for w, x, y, and z, and compute the answer. 

 

Can you take it from here?

 Jun 27, 2022

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