Answer:a
Step-by-step explanation:
The rate of change is the slope.
slope = m = (-11 - (-1))/(2 - 0) = (-11 + 1)/(2) = -10/2 = -5
The initial value is the y-intercept. The y-intercept is (0, -1), so the initial value is -1.
Let x be ml of 5% soln.
let 500-x be ml of 25% soln.
.
x*.05=.05x
(500-x)*.25=125-.25x
500*.20=100
.
.05x+125-.25x=100
-.2x=-25
x=-25/-.2
x=125 ml of 5% soln.
500-x=375 ml of 25% soln.
.
Check:
125*.05= 6.25
375*.25=93.75
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========100
Since 4 does not equal 14, this answer is no solution.
Answer: x= 1/2, - 3/2
Step-by-step explanation:
