-2x+9y=41.... equation 1
-2x-5y=1 ....equation 2
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14y=43
y=43/14
y=43/14 in equation 1
-2x+9(43/14)=41
-2x+387/14=41
-2x=41-387/14
-2x=187/14
x=187/-28
x=187/28 , y=43/14
if you want to check your answer
-2(187/28)+9(43/14)=41
What is 121/25 in decimal form?
To write 121/25 as a decimal, you have to divide the numerator by the denominator of the fraction.
<span>
We divide now 121 by 25 what we write down as 121/25 and we get 4.84 </span>
<span>And finally we have: </span>
121/25 as a decimal<span> equals </span><span>4.84</span>
Answer:
8.46 gallons needed to be replaced
Step-by-step explanation:
Let x be the alcohol amount that replaced
-Original has concentration of 15% multiply by the amount of 10 ,which is equal to (0.15×10).
-Removed has concentration of 15% multiply by the amount of x ,which is equal to (0.15 × X).
-Added has concentration of 80% multiply by the amount of X ,which is equal to (0.8× X).
-Solution has concentration of 70% multiply by the amount of 10 ,which is equal to (0.70×10).
So that, the equation will be:
Solution=Original + added - removed
7=1.5+0.8x-0.15x
7-1.5=0.65x
0.65x=55
x=55/0.65
x=8.46
8.46 gallons needed to be replaced.
Answer:
multiply 200 by .8
its 160
Step-by-step explanation:
