<em>Answer:</em>
<em>x = -14</em>
<em>Step-by-step explanation:</em>
<em>Hi there !</em>
<em>36 = - 3(x + 2)</em>
<em>36 = - 3x - 6</em>
<em>3x = - 36 - 6</em>
<em>3x = - 42</em>
<em>x = - 42/3</em>
<em>x = - 14</em>
<em>Good luck !</em>
Answer:
Step-by-step explanation:
Expression for the rectangular area and perimeter are, respectively:
After some algebraic manipulation, area expression can be reduce to an one-variable form:
The first derivative of the previous equation is:
Let the expression be equalized to zero:
The second derivative is:
According to the Second Derivative Test, the critical value found in previous steps is a maximum. Then:
The maximum area is:
Answer:3/5
Step-by-step explanation:
Just set up the equation and solve for x, that is the time.
40(0.9-x) = 5x
36 = 45x
x = 36/45
x = 0.8
It took Talia 0.8 hours (48 minutes) to walk home.
Hello!
To find the area of a rectangle you do length * width
You can plug in the values you know
(x - 2) * 5 = 30
Divide both sides by 5
x - 2 = 6
Add 2 to both sides
x = 8
The answer is 8
Hope this helps!