1) 3x - 2y = -16 Subtract 3x from both sides
-2y = -3x - 16 Divide both sides by -2
y = 
x + 8
2) 9x - 7y = -7 Subtact 9x from both sides
-7y = -8x - 7 Divide both sides by -7
y = 
+ 1
3) x - 3y = 6 Subtract x from both sides
-3y = -x + 6 Divide both sides by -3
y = 
- 2
<span>No.
The test is not a fair test. The test is artificial. Testing the disinfectant against bacteria in a
test tube is not representative of the effectiveness of the disinfectant
against microbes in the environment. Test tube tests test for efficacy.
Effectiveness can only be tested out in the environment.</span>
Let
x--------> the number of minutes
y-------> the total liters of water sold
we know that
y=150x
Divide 7,500 by 150
=(7,500/150)=50 minutes
<u>Check</u>
For x=50 minutes
Find the value of y
y=150*(50)=7,500 liters of water sold------> is ok
<u>Find the domain</u>
The domain will be the interval------> [0,50] minutes
<u>Find the range</u>
The range will be the interval------> [0,7,500] liters of water sold
Answer b hope i helped have a good day
