Call the length
![l](https://tex.z-dn.net/?f=l)
and the width
We are told:
1. "<span>The length of a rectangle is 3 times its width." i.e.:
![l=3w](https://tex.z-dn.net/?f=l%3D3w)
2. "</span><span>The rectangle’s width is 4 m." i.e.:
![w=4](https://tex.z-dn.net/?f=w%3D4)
So, by substitution we have:
![l=3w](https://tex.z-dn.net/?f=l%3D3w)
![l=3(4)](https://tex.z-dn.net/?f=l%3D3%284%29)
![l=12m](https://tex.z-dn.net/?f=l%3D12m)
Then we can use our area formula:
![A=lw](https://tex.z-dn.net/?f=A%3Dlw)
![A=(12m)(4m)](https://tex.z-dn.net/?f=A%3D%2812m%29%284m%29)
![Area=48m^{2}](https://tex.z-dn.net/?f=Area%3D48m%5E%7B2%7D)
</span>
Answer:
$375
Step-by-step explanation:
Step 1: Set up expression
150(1 + 150%)
Step 2: Convert %
150(1 + 1.5)
Step 3: Solve
150(2.5)
375
This is what you need i think
Answer:
1. 36 rocks in total.
2. 15 purple rocks more than blue rocks
Step-by-step explanation:
1. Purple rocks are
of all rocks, then the remainder is
of all rocks.
2. Blue rocks are
of the remainder, then blue rocks are
of all rocks.
3. Silver rocks are the rest, that is
of all rocks.
4. It is known that the number of silver rocks is 3, then if x is the number of all rocks,
of x is 3:
![\dfrac{1}{12}\cdot x=3,\\ \\x=3\cdot 12,\\ \\x=36.](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B12%7D%5Ccdot%20x%3D3%2C%5C%5C%20%5C%5Cx%3D3%5Ccdot%2012%2C%5C%5C%20%5C%5Cx%3D36.)
Hannah has 36 rocks in total. 3 of them are silver,
are blue and
are purple. Then she has
more purple rocks than blue.