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Daniel [21]
3 years ago
13

Five times the difference of twice a number and seven is negative twenty-five. Find the number.

Mathematics
1 answer:
Sati [7]3 years ago
4 0

The number is 1

Step-by-step explanation:

Let x be the required number

Then according to given statement

Five times the difference of twice a number and seven is negative twenty-five.

5(2x-7) = -25

Simplifying

10x-35 = -25\\

Adding 35 on both sides

10x-35+35 = -25+35\\10x = 10

Dividing both sides by 10

\frac{10x}{10} = \frac{10}{10}\\x = 1

Verification:

5[2(1)-7] = -25\\5(2-7) = -25\\5(-5) = -25\\-25=-25

Hence,

1 is the number

Keywords: Linear equation

Learn more about linear equation at:

  • brainly.com/question/4706270
  • brainly.com/question/4710621

#LearnwithBrainly

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Katyanochek1 [597]

Answer:

Step-by-step explanation:

Please write points using parentheses:  (4, 5) and (-4, 8}.

​

(4, 5) is in the 1st quadrant and (-4, 8} is in the 2nd. Reversing the order of these two points yields (-4, 8) and (4, 5).  From this we can see that while moving from (-4, 8) to (4, 5) involves following a line with negative slope (because the y-coordinate decreases from 8 to 5 as the x-coordinate increases from -4 to +4).  This sloping line is the hypotenuse of a right triangle.  Draw a vertical line segment through (-4, 8) and a horizontal line segment through (4, 5).  This hypotenuse, the vertical line segment and the horizontal line segment are the boundaries of the desired right triangle.  

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4 years ago
Using the quadratic formula to solve 5x = 6x2 – 3, what are the values of x?
elena55 [62]
<span>6x2 -5x –3 = 0
a = 6 b=-5 and c=-3

x = [-b +-sq root (b² -4ac)] / 2a
x = [--5 +-sq root (25 -4*6*-3)] / 2*6
x = [5 +- sq root (25 +72)] / 12
x = [5 +- sq root (97)] / 12

x1 = [5 + </span><span><span><span>9.8488578018 </span> </span> </span> ] / 12
x1 = <span> <span> <span> 14.8488578018 </span> </span> </span> / 12
x1 = <span> <span> <span> 1.2374048168 </span> </span> </span>

x2 = [5 - <span> <span> <span> 9.8488578018 </span> </span> </span> ] / 12
x2 = <span> <span> <span> -4.8488578018 </span> </span> </span> / 12
x2 = <span> <span> <span> -0.4040714835 </span> </span> </span>


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4 years ago
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erastovalidia [21]

Answer:

50

Step-by-step explanation:

I took the test

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Answer:

254.5m^2

Step-by-step explanation:

Use the formula for the area of a circle given the radius:

A = πr^2

A = 3.14(9)^2

A = 254.47m^2

Round to the nearest tenth:

A = 254.5m^2

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Answer:

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