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
Well that's a 10cm radius and the formula for area of a circle is A= 3.14•R(squared). So to plug that in, that would be 3.14 • 10 squared or 3.14 • 100. 3.14•100=314
Answer:
B
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m =
with (x₁, y₁ ) = (0, - 6) and (x₂, y₂ ) = (8, - 4) ← 2 points on the line
m = = =
The line crosses the y- axis at (0, - 6 ) ⇒ c = - 6
y = x - 6 → B
Answer:
the answer is -10
Step-by-step explanation:
x=x
y=5
then
3x+5y=-5
3x+5*5=-5
3x=-5-25
3x=-30
x=-30/3
•°•x=-10
3 x 5/7 + 2 x 6/7
15/7 + 12/7 = 27/7 or 3.85714286