Given:
To find:
The value of 
.
Solution:
We know that,
It means, we have 
and we need to find the value of 
.
Therefore, the value of is 0.8.
Answer:
Step-by-step explanation:
-(-2 + 3x - 1/2) = -( -2 - 0.5 + 3x)
= -(-2.5 + 3x)
= -1*(-2.5) + (-1)*3x
= 2.5 - 3x
2.5 - 3x is not equivalent to 2.5 + 3x
You would round to the 100,000th place to find a rounded number closest to 9,760,000 because the 60,000 makes the 700,000 because an 800,000.
Answer:
2n-10
Step-by-step explanation:
Let n = the number
Two times a number
2n
Minus 10
2n-10
<em>x</em> = gallons of the 50% solution
<em>y</em> = gallons of the 75% solution
The total volume of the new mixture is 50 gal, so
<em>x</em> + <em>y</em> = 50
Each gal of 50% solution contributes 0.5 gal of acid, and each gal of the 75% solution contributes 0.75 gal of acid. The final mixture needs to have a concentration of 60% acid, which amounts to 0.6*(50 gal) = 30 gal of acid, so
0.5<em>x</em> + 0.75<em>y</em> = 30
Solve for <em>x</em> and <em>y</em> :
<em>y</em> = 50 - <em>x</em>
0.5<em>x</em> + 0.75(50 - <em>x</em>) = 30
0.5<em>x</em> + 37.5 - 0.75<em>x</em> = 30
7.5 = 0.25<em>x</em>
<em>x</em> = 30 ==> <em>y</em> = 20
