It’s D bc Dt= 15x3 and it’s not that hard to solve
Answer:
520,000
Step-by-step explanation:
1400 x 200 = 280000
(400 + 800) x 400 /2 = 240000
240000 + 280000 = 520000
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![4z + 2 = 10z - 1](https://tex.z-dn.net/?f=4z%20%2B%20%202%20%3D%2010z%20-%201)
Add sides 1
![4z + 2 + 1 = 10z - 1 + 1](https://tex.z-dn.net/?f=4z%20%20%2B%202%20%20%2B%201%20%3D%2010z%20-%201%20%2B%201)
![4z + 3 = 10z](https://tex.z-dn.net/?f=4z%20%2B%203%20%3D%2010z)
Subtract sides 4z
![- 4z + 4z + 3 = - 4z + 10z](https://tex.z-dn.net/?f=%20-%204z%20%2B%204z%20%2B%203%20%3D%20%20-%204z%20%2B%2010z)
![3 = 6z](https://tex.z-dn.net/?f=3%20%3D%206z)
![6z = 3](https://tex.z-dn.net/?f=6z%20%3D%203)
Divide sides by 6
![\frac{6z}{6} = \frac{3}{6} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B6z%7D%7B6%7D%20%20%3D%20%20%5Cfrac%7B3%7D%7B6%7D%20%20%5C%5C%20)
![z = \frac{1}{2} \\](https://tex.z-dn.net/?f=z%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5C%5C%20)
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![3y = y + 3](https://tex.z-dn.net/?f=3y%20%3D%20y%20%2B%203)
Subtract sides y
![- y + 3y = - y + y + 3](https://tex.z-dn.net/?f=%20-%20y%20%2B%203y%20%3D%20%20-%20y%20%2B%20y%20%2B%203)
![2y = 3](https://tex.z-dn.net/?f=2y%20%3D%203)
Divide sides by 2
![\frac{2y}{2} = \frac{3}{2} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B2y%7D%7B2%7D%20%20%3D%20%20%5Cfrac%7B3%7D%7B2%7D%20%20%5C%5C%20)
![y = \frac{3}{2} \\](https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B3%7D%7B2%7D%20%20%5C%5C%20)
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Thus the correct answer is :
![a) \: y = \frac{3}{2} \: , \: z = \frac{1}{2} \\](https://tex.z-dn.net/?f=a%29%20%5C%3A%20y%20%3D%20%20%5Cfrac%7B3%7D%7B2%7D%20%20%5C%3A%20%2C%20%5C%3A%20z%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5C%5C%20)
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Answer:
need points
Step-by-step explanation:
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