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lubasha [3.4K]
3 years ago
14

Solve for x. 4≥10−7x x≥−2 x≤−2 x≥2 ( I think this is the correct answer) x≤2

Mathematics
2 answers:
Allisa [31]3 years ago
6 0
<span>= -4 ≥ 10 − 7x         [ changed 4 to -4 on the request of questioner ]
Subtract 10 from both sides, 
= -4 - 10 </span>≥ -7x + 10 - 10
= -14 ≥ -7x

Divide both sides from -7, 
= -14/-7 ≤ -7x/-7    [ sign changed as we use "-" here ]
= x ≥ 2

In short, Your Answer would be x ≥ 2 which is Option C

Hope this helps!
Sloan [31]3 years ago
6 0
<span>4 ≥ 10−7x

Place like terms together

7x </span><span>≥ 10 - 4</span>

7x <span>≥ 6

x </span><span>≥ 6/7

The answer is  </span>x <span>≥ 6/7

Cross check the question properly and go through the steps.
</span>
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X2 - 2x + 2 = 0
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Answer:

Step-by-step explanation:

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1.  Take the coefficient of x:  It is -2.

2.  Halve this, obtaining -1.

3.  Square this result, obtaining 1.

4.  Add 1, and then subtract 1, between -2x + 2:

    x^2 - 2x + 1 - 1 + 2 = 0

5.  Rewrite x^2 - 2x + 1 + 1 = 0 beginning with the square of a binomial

    (x - 1)^2 + 1 = 0, or (x - 1)^2 = -1

6.  Take the square root of both sides, obtaining x - 1 = ±i, or x = 1 ±i

7.  Write out the roots:  they are x = 1 + i and x = 1 - i (two complex, different roots).  No real roots, so the last command of this question is irrelevant.  The graph never touches the x-axis; the graph is in Quadrants I and II and is that of a parabola that opens up.

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mariarad [96]

Answer:

f(10) = 1147.25

Step-by-step explanation:

Given

f(-1.5) = 26

f(5.5) = 7

Required

f(10)

An exponential function is represented as:

f(x) = ab^x

f(-1.5) = 26 impleies that:

26 = ab^{-1.5} --- (1)

f(5.5) = 7 implies that

7 = ab^{5.5} --- (2)

Divide (2) by (1)

26/7 = ab^{-1.5}/ab^{5.5}

3.71429 = b^{-1.5+5.5}

3.71429 = b^{4}

Take 4th root

b = 1.39

Substitute b = 1.39 in 26 = ab^{-1.5}

26 = a * 1.39^{-1.5}

26 = a * 0.6102

Solve for (a)

a = 26/0.6102

a = 42.61

f(10) is calculated as:

f(10) = ab^{10}

f(10) = 42.61 * 1.39^{10}

f(10) = 1147.25

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3 years ago
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Answer:

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Nina can type 128 words is 4 minutes. At this rate, how many words can Nina type in an hour?

60 divided by 4 is 15

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