Answer:
-0.38
Step-by-step explanation:
0.6-(0.7)(1.4)
0.6-0.98
-0.38
Let x represent the amount of 10% solution used.
Let y represent the amount of 25% solution used.
Since 30 liters of 15% solution are being made, our first equation is
x + y = 30
Now we deal with the actual peroxide in each solution.
x liters of 10% peroxide contain 0.1x liters of peroxide.
y liters of 25% peroxide contain 0.25y liters of peroxide.
30 liters of 15% peroxide contain 0.15 * 30 = 4.5 liters of peroxide.
From this information, we can write our second equation.
0.1x + 0.25y = 4.5
We have a system of equations:
x + y = 30
0.1x + 0.25y = 4.5
Multiply the first equation by -0.25 and add to the second equation.
-0.25x - 0.25y = -7.5
0.1x + 0.25y = 4.5
---------------------------
-0.15x = -3
x = 20
Answer: 20 liters
1 ft = 12 inches
therefore, 15 inches is more then 1 ft
Answer:
x^2 - x + 18
Step-by-step explanation:
f(x) = x^2+9
g(x) = x-9
Therefore f(x)-g(x),
= x^2 + 9 - (x - 9)
= x^2 + 9 - x +9
<h2>= x^2 - x + 18</h2><h2 /><h2 /><h2><u><em>
PLEASE MARK MY ANSWER AS BRAINLIEST!!!!!</em></u></h2>
Think of it as a normal linear equation first. Let's find the slope.
m = rise/run = (3-1)/(0-1) = -2
We know the slope is negative now, so we can immediately get rid of the first two answers. Now, we know that the solutions must be under the line itself, so we can try figuring it out by testing some points. Let's use (0,0).
Is 0 </> 0+3? Since it's <, then we know the last answer is correct (y < -2x + 3).
