45 hours.
80 - 70= 10, and 450/10 is 45.
to justify, you can do 70x45= 3,150, and 80x45= (3,600 - 3,150= 450)
x − 3y = 12
<span>2x + 6y = 60</span>
<span>x=12+3y</span>
<span>2(12+3y)+6y=60</span>
<span>24+6y+6y=60</span>
<span>24+12y=60</span>
<span>12y=60-24</span>
<span>12y=36</span>
<span>y=36/12</span>
<span>y=3</span>
<span>and since the only answer you have with y being 3 is 21,3 the answer is D.(21,3)</span>
Answer:
Distributive
Addition property of equality
Given
Division property of equality
Given
Step-by-step explanation:
:)
Hope this helps!
The answer is 9 if you plug them in
