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Triss [41]
3 years ago
10

7 less than 4 times a number equals 13 ​

Mathematics
1 answer:
Lisa [10]3 years ago
4 0

Answer:

X = 5

Step-by-step explanation:

4x - 7 = 13

4x = 13 + 7

4x = 20

x = 20 / 4

x = 5

Hope it Helps :) !!

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Which of the following graphs represents the function f(x) = x4 - 2x3 - 3x2 + 4x + 1?
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Answer: Graph D will be correct graph for the given function.

Explanation:

Given function f(x) = x^4-2x^3-3x^2+4x+1

Since it is a bi-quadratic equation thus it must have 4 roots and (0,1) is one of its point.

Moreover, the degree of the function is even thus the end behavior of the function isf(x)\to+\infty, as x\to-\infty and f(x)\to+\infty as x\to+\infty

In graph A, function has four root but it does not have the end behavior same as function f(x).( because in this graph f(x)\to-\infty, as x\to-\infty and f(x)\to-\infty, as x\to+\infty.) so, it can not be the graph of given function.

In graph B,  neither  it has four root nor it has the end behavior same as function f(x).(because in this graph f(x)\to+\infty as  x\to-\infty and f(x)\to-\infty as x\to+\infty.) so, it can not be the graph of given function.

In graph C, neither  it has four root nor it has the same end behavior as function f(x).(because in this graph f(x)\to-\infty as  x\to-\infty and f(x)\to+\infty asx\to\infty.) so, it also can not be the graph of given function.

In graph D it has four root as well as it has the same end behavior as the given function. Also it passes through the point (0,1).

Thus, graph D is the graph of given function.



4 0
3 years ago
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ZanzabumX [31]

Answer:

a. No

b. Yes

c. No

d. Yes

e. Yes

Step-by-step explanation:

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b. -6 - 10 = -4. Yes

c. 6 × 4.6 = 27.6. No

d. 15 × 3.9 = 58.5. Yes

e. -6 × (-5) = 30. Yes

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Answer:

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x and y switch places and x's sign is changed

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Answer:

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It says 9 plus a number, so plug in x for 'a number', and it says 'is twice a number plus 14'. Plug in '=' for is another variable for 'a number', and last but not least, just put +14 for plus 14

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