Which is equivalent to 23·2-5? A) 2-15 B) 2-8 Eliminate C) 2-2 D) 22
1 answer:
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Answer:
A
Step-by-step explanation:
That's the formula for the solution of a quadratic equation, like this:
The formula is:
In your case:
The only answer that has c = -2 is the first one, A.
If you move the 5 to the left-hand side, it becomes -5 and with the +3 gives a -2.
Answer:
She should add 30 ounces of the 12% vinegar she should add to 40 ounces of the 5% vinegar to obtain the needed vinegar with an 8% acidity level.
Step-by-step explanation:
Let X be ounces of the 12% vinegar she should add to 40 ounces of the 5% vinegar to obtain the needed vinegar with an 8% acidity level.
We have the equation
when 8% acidity level is reached.
Solving the equation we have
X*0.12+2=0.08(X+40)=0.08X+3.2
That is 0.12X-0.08X=3.2-2=1.2
Finally 0.04X=1.2 and
X=30
Answer:
First, transform the given equation into the slope-intercept form, y = mx + b.
2x - 3y < 12
3y > 2x - 12
y > x - 4
Since the equation is y > x - 4, first draw the graph of y =
x - 4 with a dotted line (because it is >, not ≥) and shade the area above the dotted line.
