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3 years ago

Drag each equation to show if it could be a correct first step to solving the equation

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

6 0

Answer:

3 + 4x = 36----->No

(4.3)+(4 . x)= 36------>Yes

4(3 + x)= 144--------->No

3+ x = 9-------> Yes

12 + x = 36------>No

12 + 4x = 36------->Yes

Step-by-step explanation:

The given equation is

$4(3 + x) = 36$

A correct first step is to expand the LHS to get:

$12 + 4x = 36$

Or to divide through by 4 to get:

$3 + x = 9$

Or just distribute to get:

$4 \cdot 3 + 4 \cdot \: x = 36$

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choli [55]

Answer: Amount of 35% solution required = 100 milliliters

Amount of 87% solution required = 30 milliliters

Step-by-step explanation:

Given: Total solution required = 130 milliliters

Let x = Amount of 35% solution (in milliliters).

Then, Amount of 87% solution required = 130 - x

As per given,

Concentration = 0.35x +0.87(130-x)=0.47(130)

$0.35x +113.1-0.87x=61.1\\\\\Rightarrow\ -0.87x+0.35x=61.1-113.1\\\\\Rightarrow\ -0.52 x= -52\\\\\Rightarrow\ x=\dfrac{52}{0.52}=100$

Hence, Amount of 35% solution required = 100 milliliters

Amount of 87% solution required = 130-100 milliliters =30 milliliters

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3 years ago

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erik [133]

Answer:

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Step-by-step explanation:

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blagie [28]

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Fourth, multiply '8 × 4' to get '32'.
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Fifth, you can switch your sides.
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Step-by-step explanation:

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