Write each of the following expressions without using absolute value. |z−7|−|z−9|, if z<7
1 answer:
Answer:
-2
Step-by-step explanation:
z - 7 ≥ 0
z ≥ 7
| z - 7 | = z - 7, z ≥ 7
| z - 7 | = -z + 7, z < 7
z - 9 ≥ 0
z ≥ 9
| z - 9 | = z - 9, z ≥ 9
| z - 9 | = -z + 9, z < 9
| z - 7 | = -z + 7
| z - 9 | = -z + 9
|z - 7| - |z - 9|
-z + 7 - (-z + 9)
-z + 7 + z - 9
= -2
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PQ+RS
I’m assuming are multiplying each variable together so...
P=4
Q=-2
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R=3
S=-5
3 x -5=-15
Final Solution: -8+(-15)=-23
Answer:
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Hope this helps you
Add ten to both sides
Then combine the like terms
9x=81
X= 9
Neither because they bot weigh a pound
