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julsineya [31]
3 years ago
12

Find the sum of x^2+3x and -2x^2+9x+5

Mathematics
1 answer:
11111nata11111 [884]3 years ago
3 0

Answer:

-x^2 +12x +5

Step-by-step explanation:

x^2+3x + -2x^2+9x+5

I like to line them vertically

  x^2+3x

-2x^2+9x+5

---------------------

-x^2 +12x +5

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What would the answer be for this equation 7x/20 - 5x/12
polet [3.4K]

Answer:

\frac{1}{15} x

Step-by-step explanation:

\frac{7x}{20}  -  \frac{5x}{12}

\frac{3 \times 7x}{3 \times 20}  -  \frac{5 \times 5x}{5 \times 12}

\frac{21x}{60}  -  \frac{25x}{60}

\frac{21x - 25x}{60}  = (21 - 25)x =  - 4x

\frac{ - 4x}{60}  =  -  \frac{ x}{15}

\boxed{\green{=  \frac{1}{15} x}}

4 0
3 years ago
Complete the blank with either ∈ or ∉ so that the resulting statement is true. −2​__{−6,−3,−5,−1}
Misha Larkins [42]

Answer:

−2​ ∉ {−6,−3,−5,−1}

Step-by-step explanation:

Given

Set = {−6,−3,−5,−1}

Element = -2

Required

The interpretation of the question is to state if -2 is an element of the given set or not

The first thing to do is to check through the set to count the number of occurrence of -2

Looking through Set = {−6,−3,−5,−1}, we have that the occurrence of -2 is 0

This implies that -2 is not an element of the given set and this is represented by the symbol ∉

Hence:

−2​ ∉ {−6,−3,−5,−1}

7 0
3 years ago
F−1(−2) = <br><br> f(−4) = <br><br> f(f−1(−2)) =
Sauron [17]

need more information

7 0
3 years ago
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Which ratio is equivalent to 4/9
Dmitrij [34]

Answer:

D. 12/27

Step-by-step explanation:

Ratios are just like fractions

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27 ÷ 3 = 9

4/9 is 12/27 simplified by 3

5 0
3 years ago
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Mamont248 [21]

Answer:

The 11th term is 3072.

Step-by-step explanation:

First, find the common ratio and the first term. The common ratio is 6/3 or 2. The first term is 3.

Use the direct formula, xi=a*r^i-1, to find the eleventh term. a is first term, and i is the index or the number of the term.

Substitute: x11=3*2^(11-1)

Or x11=3*2^10

So x11 is 3072

5 0
3 years ago
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