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

#1**+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**+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