A quart is 32 ounces. The usual "bleach" is a 1.25% bleach solution, so you can't easily make a 5% solution from it. If you had pure "bleach" (usually sodium hypochlorite), you would need 5% of 32 ounces, which is 1.6 ounces of it. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
Answer:
Arla - $15, Kal - $17.5
Step-by-step explanation:
Let $x be Arla's hourly wage and $y be Kal's hourly wage.
1. In the first week on the job they each worked 40 hours and earned $(40x+40y) together. Their total earnings were $1300, so
40x+40y=1300.
2. In the second week on the job business was slow so Arla worked 20 hours and earned $20x, Kal worked 16 hours and earned $16y, $(20x+16y) in total. Their total pool earning was $580, so
20x+16y=580.
3. Solve the system of two equations:

Subtract them:

Then

Rearranging the 1st equation, we have 2y = 12 + 3x.
By substitution, x = (12 + 3x) - 8.
Therefore, x = -2 and y = 3.
-x^2y^2 + x4 + 4y^2 - 4x^2
= x^2(x^2 - y^2) -4(x^2 - y^2)
= (x^2 - y^2) (x^2 - 4)
=(x + y)(x -y)(x + 2)(x - 2)
answer
3.) (x + 2)(x - 2)(x + y)(x - y)
= (y^2 - x^2) (