Answer:
<h2>d = -4</h2>
Step-by-step explanation:
20 = -d + 16 <em>subtract 16 from both sides</em>
20 - 16 = -d + 16 - 16
4 = -d <em>change the signs</em>
-4 = d ⇒ d = -4
Answer:
$138
Step-by-step explanation:
We can first turn the words into a mathematical equation by substituting words with the information we have:
Total earning - ( Price of three books)
$180 - (Price of one book x 3)
$180 - ($14 x 3)
Finally, after we have created the mathematical equation, we solve it!
$180 - ($14 x 3)
$180 - $42
$138
The question is worded poorly, but it looks like you have a lever in equilibrium, with a force x at a distance d from the fulcrum, and a force y at a distance L - d from the fulcrum. You already have the equilibrium formula for this situation:
xd = y(L - d)
If you know x, y, and d, you can solve for the length L.
Answer:
4x+28-9
Step-by-step explanation:
4 times x and 7 - 9