A is the concentration of the first container, B the second container.
300a+600b=900·(15)=13500
1.3a+6b=135
100a+500b=600·(12.5)=7500
2.a+5b=75
Multiply eq. 2 by (-3) and add to eq. 1 to eliminate A.
3a+6b-3a-15b=135-225
-9b=-90
b=10
Then from eq. 2,
a+50=75
a=25
The first container is a 25% solution and the second container is a 10% solution
Answer:
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7gycuffguxh0h8h8bibihih and his colleagues are now on 8to 999as in 9999o
<em>x = - 6</em>
<em>y = - 2</em>
- Step-by-step explanation:
<em>-3x + 5y = 8 | ×(-2)</em>
<em>-2x + 7 y = -2 | ×3</em>
<em />
<em>6x - 10y = - 16</em>
<em>- 6x + 21y = - 6</em>
<em>add</em>
<em>6x - 6x - 10y + 21y = - 16 - 6</em>
<em>11y = - 22</em>
<em>y = - 22 : 11</em>
<em>y = - 2</em>
<em>replace y</em>
<em>- 2x + 7(-2) = - 2</em>
<em>- 2x - 14 = - 2</em>
<em>- 14 + 2 = 2x</em>
<em>2x = - 12</em>
<em>x = - 12 : 2</em>
<em>x = - 6</em>
I think that the answer is 16
9514 1404 393
Answer:
30.00 feet
Step-by-step explanation:
The shadow of the tree is 5 times the length of Robert's shadow, so we expect the height of the tree to be 5 times the height of Robert.
5 × (6 feet) = 30 feet
The height of the tree is 30 feet.
