+0  
 
0
198
6
avatar+2509 

Help.

NotSoSmart  Nov 1, 2017
 #1
avatar+86859 
+1

For the first one.....here's a hint......expand each answer.....see if the second one leads you to

 

y = x^2  + 4x  -  3

 

 

cool cool cool

CPhill  Nov 1, 2017
 #2
avatar+2509 
+1

Is it the second choice 

NotSoSmart  Nov 1, 2017
 #4
avatar+86859 
0

Correct  !!!!!

 

 

cool cool cool

CPhill  Nov 1, 2017
 #3
avatar+86859 
+1

For the  second one.....I'll use a graph  [ although I can also solve it algebraically, if you want me to ]

 

Look at the graph, here.....

 

https://www.desmos.com/calculator/sic40iw0e7

 

The height of the arch is ≈ 381 ft   and  the length of the bridge above the arch is ≈ 1791 ft

 

 

cool cool cool

CPhill  Nov 1, 2017
edited by CPhill  Nov 1, 2017
 #5
avatar+2509 
0

so that would be the last answer choice

NotSoSmart  Nov 1, 2017
 #6
avatar+86859 
0

Yep...last choice.....

 

 

cool cool cool

CPhill  Nov 1, 2017

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