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alexira [117]
3 years ago
8

What is the solution to the inequality d/7+4

Mathematics
2 answers:
vodomira [7]3 years ago
7 0
<span>d/7+4 = 0
d/7 = -4
d = -4 * 7 
d = -28</span>
Sedaia [141]3 years ago
6 0
I think the answer would be d(greater than or equal to) -28
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They paid $24 each for the rental.
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Explain how to model the division of –20 by –5 on a number line.
kenny6666 [7]
Star at -20 and go back by -5 on the number line 
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3 years ago
Can someone help me, please and thank you? I'll give BRAINLEST to the person who gets it right!!!
dmitriy555 [2]

Answer:

x = - 4

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2x = - 8

x = - 4

5 0
3 years ago
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What are the solutions to the equation
frosja888 [35]

Answer:

C.

x_1=\frac{1}{4}+(\frac{\sqrt{7}}{4})i and x_2=\frac{1}{4}-(\frac{\sqrt{7} }{4})i

Step-by-step explanation:

You have the quadratic function 2x^2-x+1=0 to find the solutions for this equation we are going to use Bhaskara's Formula.

For the quadratic functions ax^2+bx+c=0 with a\neq 0 the Bhaskara's Formula is:

x_1=\frac{-b+\sqrt{b^2-4.a.c} }{2.a}

x_2=\frac{-b-\sqrt{b^2-4.a.c} }{2.a}

It usually has two solutions.

Then we have  2x^2-x+1=0  where a=2, b=-1 and c=1. Applying the formula:

x_1=\frac{-b+\sqrt{b^2-4.a.c} }{2.a}\\\\x_1=\frac{-(-1)+\sqrt{(-1)^2-4.2.1} }{2.2}\\\\x_1=\frac{1+\sqrt{1-8} }{4}\\\\x_1=\frac{1+\sqrt{-7} }{4}\\\\x_1=\frac{1+\sqrt{(-1).7} }{4}\\x_1=\frac{1+\sqrt{-1}.\sqrt{7}}{4}

Observation: \sqrt{-1}=i

x_1=\frac{1+\sqrt{-1}.\sqrt{7}}{4}\\\\x_1=\frac{1+i.\sqrt{7}}{4}\\\\x_1=\frac{1}{4}+(\frac{\sqrt{7}}{4})i

And,

x_2=\frac{-b-\sqrt{b^2-4.a.c} }{2.a}\\\\x_2=\frac{-(-1)-\sqrt{(-1)^2-4.2.1} }{2.2}\\\\x_2=\frac{1-i.\sqrt{7} }{4}\\\\x_2=\frac{1}{4}-(\frac{\sqrt{7}}{4})i

Then the correct answer is option C.

x_1=\frac{1}{4}+(\frac{\sqrt{7}}{4})i and x_2=\frac{1}{4}-(\frac{\sqrt{7} }{4})i

3 0
3 years ago
The value of a collectible coin can be represented by the equation Y=2x+15, where x represents its age in years and y represents
muminat

Answer:

53

Step-by-step explanation:

2*19 =38

then by substituting 2x=38

then,

38+15=53

5 0
3 years ago
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