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Andrei [34K]
3 years ago
13

Simplify ; 7a+4b+7a-3b

Mathematics
2 answers:
Afina-wow [57]3 years ago
8 0
14a+b is the correct answer
LuckyWell [14K]3 years ago
8 0
The answer is 14a+b
You need to add the like terms together: 
7a+7a=14a
4b-3b=b (1b is the same as "b" but 1b is sloppy)
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If the sin 90° is 1, then the cos ____ °= _____
lorasvet [3.4K]
That sentence is confusing...

That sentence is confusing...
There is no logical relationship between the prepositions.
You can put any angle and its cosine there.
You can put, for example:

Cos(90)=0 or Cos(0)=1... Both are correct options...

If your teacher wrote that, he doesn't know to write very good...

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M.
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3 years ago
Simplify. Assume that no denominator is equal to zero.
bearhunter [10]

Answer:

20

Step-by-step explanation:

7 0
3 years ago
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What is the factorization of 3x2 – 8x + 5?
ELEN [110]

we have

3x^{2} -8x+5

Equate the expression to zero to find the roots

3x^{2} -8x+5=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

3x^{2} -8x=-5

Factor the leading coefficient

3(x^{2} -(8x/3))=-5

Complete the square. Remember to balance the equation by adding the same constants to each side.

3(x^{2} -(8x/3)+(16/9))=-5+(16/3)

3(x^{2} -(8x/3)+(16/9))=(1/3)

Rewrite as perfect squares

3(x-(4x/3))^{2}=(1/3)

(x-(4x/3))^{2}=(1/9)

square roots both sides

(x-\frac{4}{3})=(+/-) \sqrt{\frac{1}{9}}

x=\frac{4}{3}(+/-) \frac{1}{3}

the roots are

x=\frac{4}{3}+ \frac{1}{3}=\frac{5}{3}

x=\frac{4}{3}- \frac{1}{3}=\frac{3}{3}=1

so

3x^{2} -8x+5=3(x-\frac{5}{3})(x-1)=(3x-5)(x-1)

therefore

<u>the answer is the option</u>

(3x-5)(x-1)

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3 years ago
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Which equation best describes the graph
sergij07 [2.7K]

Answer:

The one you have selected is correct. Its the first one. y= -1/3x + 3

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