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nicholasfoh10

Answer:

Question 19: x=9

Question 20: r<-6

Step-by-step explanation:

For question 19, the answer is nine because if you first add 5to both sides, it would be 18= 2r. If you divide both sides by 2, you would get 9=r. For question 20, if you subtract 7 on each side, you would get -2r=12 if you divide -2 on each side, r would be -6.
Answer:

19) -4 or 9.

|2x-5| = 13
2x-5 = +/- 13
2x = 5 +/-13
2x = 18 or 2x = -8
x= 9 or -4

You would draw the a closed circle with the arrow pointing to the left from -4. Closed circle means equal to the value, open circle means does not equal value. Draw a closed circle pointing to the right from 9

20) |7-2r| <19
7-2r < 19 or 7-2r >-19
-2r < 19-7 or -2r >-19-7
-2r < 12 or -2r > -26

2r > -12 or 2r<26 (multiplied negative which flips sign)

r>-6 or r<13

Open circle for both -6 and 13 and they form a boxed area in between

21) |c-26| < 0.5

C represents the circumference

Hope that helps

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