Answer:
B.
Step-by-step explanation:
Step 1: Cross-multiply
x² + 2x = 4x²
Step 2: Isolate <em>x</em>'s
2x = 3x²
0 = 3x² - 2x
Step 3: Factor
x(3x - 2) = 0
Step 4: Find roots
x = 0, x = 2/3
Step 5: Double check answers.
When you do so, you should see that only x = 0 works. And we have our answer!
Plugging in the values, we get 7(6)-4=42-4=38.
Answer:
8
Step-by-step explanation:
hope this helps
Answer:
Step-by-step explanation:
4x - 2y = 6
-2y = -4x + 6
y = -4x/-2 + 6/-2
y = 2x - 3
Answer:
h = 13cm and b= 54cm.
Step-by-step explanation:
We have that the area and the base is two centimeters longer than four times the height, that is
where b is the base and h the height. Now, the area is
.
Now, we are going to use the general formula to solve quadratic ecuations:
where a=4, b= 2 and c= -702.
or
As we are searching for the lenght, we choose the positive result:
.