Answer:
Her first mistake was in Step 2. She added 0.2 to each term instead of multiplying by 0.2.
Step-by-step explanation:
CORRECT WAY:
0.2(4+1.4y - 2.1)
0.8 + 0.28y - 0.42
0.8 - 0.42 + 0.28y
0.38 + 0.28y
WHAT TAMARA DID:
0.2(4+1.4y - 2.1)
How she got 4.2: 0.2 + 4 = 4.2
How she got 1.6y: 0.2 + 1.4y = 1.6y
How she got -1.9: 0.2 + -2.1 = -1.9
WHAT SHE DID HERE IS WRONG. REMEMBER WHEN IT IS __( ______) IT MEANS THAT YOU NEED TO MULTIPLE NUMBER OUTSIDE THE PARATNESS TO EVERY NUMBER THAT IS INSIDE THE PARATNESS.
Answer:
<h2>
![w = \frac{70y}{9x}](https://tex.z-dn.net/?f=w%20%3D%20%20%5Cfrac%7B70y%7D%7B9x%7D%20)
</h2>
Step-by-step explanation:
<h3>
![\frac{9x}{10y} = \frac{7}{w}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9x%7D%7B10y%7D%20%20%3D%20%20%5Cfrac%7B7%7D%7Bw%7D%20)
</h3>
First of all cross multiply
We have
<h3>
![9xw = 70y](https://tex.z-dn.net/?f=9xw%20%3D%2070y)
</h3>
Next divide both sides by 9x to make sure that w stands alone
That's.
<h3>
![\frac{9xw}{9x} = \frac{70y}{9x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9xw%7D%7B9x%7D%20%20%3D%20%20%5Cfrac%7B70y%7D%7B9x%7D%20)
</h3>
We have the final answer as
<h3>
![w = \frac{70y}{9x}](https://tex.z-dn.net/?f=w%20%3D%20%20%5Cfrac%7B70y%7D%7B9x%7D%20)
</h3>
Hope this helps you.
Answer:
its correct
Step-by-step explanation:
Answer:
first option
Step-by-step explanation:
hope this helps u