+0  
 
+5
1091
2
avatar+285 

10. The measure of an obtuse angle is represented by (9x + 27)º. Which is not a possible value for x?
A. 7.1
B. 12.3
C. 16.9
D. 6.8


11. Which of the following describes all the solutions to the inequality 5x + 7y ≥ 22 when  y= −4?
A. x ≤ 10
B. x ≤ −10
C. x ≥ 10
D. x ≥ −10

SelenaPubblT  Nov 21, 2014

Best Answer 

 #1
avatar+89953 
+10

 

For the first one, D is correct.....an obtuse angle is > 90....but 9(6.8)+ 27 = 88.2

 

For the second one, we have

5x + 7(-4) ≥ 22    simplify

5x - 28 ≥ 22        add 28 to each side

5x ≥ 50               divide by 5 on both sides

x ≥ 10

So C is correct

 

CPhill  Nov 21, 2014
 #1
avatar+89953 
+10
Best Answer

 

For the first one, D is correct.....an obtuse angle is > 90....but 9(6.8)+ 27 = 88.2

 

For the second one, we have

5x + 7(-4) ≥ 22    simplify

5x - 28 ≥ 22        add 28 to each side

5x ≥ 50               divide by 5 on both sides

x ≥ 10

So C is correct

 

CPhill  Nov 21, 2014
 #2
avatar
+8

Obtuse angle (obtuse angle), is an angle that greater than the right angle (90 °) is smaller than a straight angle (180 °) . Obtuse angle is formed by two rays.(180>x>90)

 so 180>9x+27>90 

     20>x+3>10 (both side divede by 9)

     17>x>7

 so it could have three  anwser B 12.3 , C 16.9  A.7.1

 but assume you typed the question wrong it,s an acute angle  refers to an angle that  greater than 0 ° but less than 90 ° 

 so 90>27+9x>0

     63>9x>-27

    7>x>-3

 then , there is only one anwser  D 6.8

is it right?

Guest Nov 22, 2014

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