so
Step-by-step explanation:
you divide 1 by 2 then time the denominator by 69
Answer:
So B has the greatest value of slope.
A has a negative slope, so A is out.
B, C and D all have positive slopes.
B has a greater slope than C, so C is out.
B has a finite slope, and D has a "slope" of infinite, but much of the time it does not count, because we do not make calculations with infinite slopes, and infinity is not a number (value).
x^2 -14x +49
( x-7)^2
x^2 -14x
We are completing the square
Take the coefficient of x
-14
Divide by 2
-14/2 = -7
Square it
(-7)^2 = 49
Add it
Take the -7
x+4=20 is a solution to 5(x+4)=100.
Following PEMDAS, divide 5 from both sides of the equation 5(x+4)=100, and you have x+4=20 remaining.
This means that both equations have the same solution.
Let x represent the quantity of 80% solution. Then 130-x is the amount of 55% solution. The total amount of salt in the mix is ...
0.80x +0.55(130 -x) = 0.75·130
0.25x = 0.20·130 . . . . . . . subtract 0.55(130)
x = 0.20/0.25(130) = 104
130-x = 26
She should use 26 ounces of 55% solution and 104 ounces of 80% solution.
<em>(14, -7)</em>
