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avatar+2442 

Please help asap (dont need help with the last one i already know the answer is 12 cm)

 Apr 17, 2018
 #1
avatar+972 
+3

Alright, he you go: 

 

Using the rule,

 

a + b > c

 

Where a, b, and c are any of the three sides of a triangle, we have three inequalities. 

 

5 + 8 > x 

 

5 + x > 8

 

8 + x > 5

 

The first one is x < 13

The second one is x > 3

The third one is x > -3

 

So the interval of x is 3 < x < 13

 

Assuming that the question is asking for the possible integer, we have: 

 

4, 5, 6, 7, 8, 9, 10, 11, and 12.

 Apr 17, 2018
 #2
avatar+98005 
+2

For the second one...using this tool : 

 

https://www.graphpad.com/quickcalcs/linear2/

 

The line fo best fit has the equation 

 

Y = 1.040*X + 5.210

 

The slope is  1.040

 

 

Third one...this is ust the graph of y   = -3x^2  shifted down 6 units

The vertex  of    y  = -3x^2  is at (0,0)

So...the vertex of this function is  (0,-6)

So...the y value of the vertx is  -6

 

 

 

cool  cool  cool

 Apr 17, 2018

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