Given:
Since the quadratic equation is equal to 0, we need to solve for x. Let's factor. Since a ≠ 1, we can easily solve. We need to find out what factors of 10 add up to 7. I know that 5*2 = 10 and 5+2 = 7. This fits out problem perfectly. Now that we have that, we can simplify it into two binomials:
Now, if it was not equal to zero, we would be done. However, we are not done. We need to set both terms equal to 0 to solve for x.
To isolate x, subtract 2 from both sides to cancel the +2 on the left.
Let's do the other one:
Same thing, subtract 5 from both sides to isolate x.
So, in conclusion, your solutions are:
<h3>
Answer: 25% decrease</h3>
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Work Shown:
A = old value = 360
B = new value = 270
C = percent change
C = (B-A)/A
C = (270-360)/360
C = -90/360
C = -0.25
C = -25%
The negative C value indicates we have a percent decrease.
Note how 25% of 360 = 0.25*360 = 90, meaning that the price has dropped by 90 galleons. And also note that 360-270 = 90 is that same figure of 90. This helps confirm the answer.
Answer:
The answer is B. 1,620
Step-by-step explanation:
I just know it did the math
Answer:
Step-by-step explanation:
Let x be the distance driven, d-distance and C our constant.
Our information can be presented as:
#Subtracting equation 2 from 1:
Hence the fixed cost per mile driven,
is $0.20
To find the constant,
we substitute in any of the equations:
Now, substituting our values in the linear equation:
#y=cost of driving, x=distance driven
Hence the linear equation for the cost of driving is y+0.2x+284
Answer:
Step-by-step explanation:
2x^2-2x-12
This has solutions of x=3 and x= -2
