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
Here is the equation:
![x+(x+3)=11](https://tex.z-dn.net/?f=x%2B%28x%2B3%29%3D11)
⇒
![x+x+3=11](https://tex.z-dn.net/?f=x%2Bx%2B3%3D11)
You need to get "x" by itself so minus 3 from each side
![x+x+3-3=11-3](https://tex.z-dn.net/?f=x%2Bx%2B3-3%3D11-3)
⇒
![x+x=8](https://tex.z-dn.net/?f=x%2Bx%3D8)
⇒
![2x=8](https://tex.z-dn.net/?f=2x%3D8)
Divide 8 by 2
![8](https://tex.z-dn.net/?f=8)
÷
![2=4](https://tex.z-dn.net/?f=2%3D4)
x=4
So each 4 is equivalent to 4
Lets check:
![4+(4+3)=11](https://tex.z-dn.net/?f=4%2B%284%2B3%29%3D11)
⇒
![4+4+3=11](https://tex.z-dn.net/?f=4%2B4%2B3%3D11)
⇒
![11=11](https://tex.z-dn.net/?f=11%3D11)
So that means that Marcus practiced the piano for 4 hours and Donnel practiced for 7
Answer:
He would be able to buy 12 gallons of gas
Step-by-step explanation:
40/9=4.44 ( this number is rounded)
54/4.44=12.162
Answer:
![3\sqrt3](https://tex.z-dn.net/?f=3%5Csqrt3)
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Since the numbers add up