Answer:
d ≤ 3.45
Step-by-step explanation:
The given inequality is :
35 ≤ 4 + 9d
We need to find the solution of the above inequality.
Subtract 4 from both sides of the inequality.
35-4 ≤ 4 + 9d -4
31 ≤ 9d
d ≤ 3.45
Out of all options, none is correct as the value of d is greater than equal to 3.45.
7 L of one solution is mixed with 3 L of another, making a new solution with a total volume of 10 L and concentration 29%. This means the new solution contains
(10 L) * 29% = (10 L) * 0.29 = 2.9 L
of acid.
Let the concentration of the first solution be <em>c</em>%. Each liter of the 15% acid solution contributes 0.15 L, and each liter of the solution of unknown concentration contributes 0.01<em>c</em> L of acid. To end up with a total of 2.9 L of acid, we would get
7 * (0.01<em>c</em> L) + 3 * (0.15 L) = 2.9 L
Solve for <em>c</em> (we can omit the units):
0.07<em>c</em> + 0.45 = 2.9
0.07<em>c</em> = 2.45
<em>c</em> = 35
So the first solution has a concentration of 35%.
Wayne is solving the linear system of equations using the graphical method, but it can also be solved analytically.
We will solve the system of equations analytically to find in which point Wayne will find the solution graphically.
Resolving we have:
y = -34x + 5 (Eq1)
x = -2 (Eq2)
Substituting (Eq2) in (Eq1) we have
y = -34 * (- 2) + 5
y = 73
Therefore the point will be
(x, y) = (- 2,73)
answer
the point will have found the solution of this system of linear equations is (-2,73)
You are right, with the total surface. next thing u want to do is multiply 290 and 0.05 and you should get your answer
Answer: nvm that took to long sorry pal
