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3 years ago

Simplify by adding (x+4) +(2x-7)

Mathematics

2 answers:

slega [8]3 years ago

7 0

Answer:

3x - 3

Step-by-step explanation:

Hello!

The first thing you want to do is REMOVE the parentheses, because they are not needed. The equations in them have already been FULLY SIMPLIFIED.

But, DON'T throw those parentheses away! Our next step is to RE-ARRANGE our terms. Have the 'x terms' on one side, and the constants on the other, putting those parentheses around the two. Your equation should look like:

(x + 2x) + (4 - 7)

Our final step is to simplify.

(1)x + 2x = 3x

4 - 7 = -3

Therefore, your final answer is 3x - 3

Hope this helped!

-Mary

AfilCa [17]3 years ago

6 0

Answer:

3x - 3

Step-by-step explanation:

(x + 4) + (2x - 7) =

The first step is to drop the parentheses since they are unnecessary.

= x + 4 + 2x - 7

Now group like terms together.

= x + 2x + 4 - 7

Combine like terms.

= 3x - 3

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there are 60 cows in a field .some are brown and the rest are white. Two thirds of the brown cows are less than one year old. Th

DIA [1.3K]

Answer: 0.7

Step-by-step explanation:

Let the number of white cows be x

Thus, the number of brown cows be (x+12)

Hence,

x+(x+12)=60

x+x+12=60

2x+12=60

2x+12-12=60-12

2x=48

Divide both parts of the equation by 2:

x=24 white cows

x+12=36 brown cows

The number of white cows are less than one year old:

$\displaystyle\\\frac{3}{4}(24)=\\\\\frac{3(24)}{4}=\\\\ 3*6=\\\\ 18\ white\ cows$

The number of brown cows are less than one year old:

$\displaystyle\\\frac{2}{3}(36)=\\\\ \frac{2(36)}{3}=\\\\ 2*12=\\\\24 \ brown \ cows$

The total number of cows are less than one year old:

$18+24=42\ cows$

Thus

Fraction of all the cows are less than one year old:

$\displaystyle\\\frac{42}{60}=\\\\\frac{6*7}{6*10}=\\\\\frac{7}{10} =\\\\ 0.7$

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2 years ago

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emmainna [20.7K]

Answer:

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Step-by-step explanation:

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