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Makovka662 [10]
3 years ago
5

The sum of digits of the 2digits. No is 12if the new number formed by reversing the digits is greater than the original number f

ind the original number
Mathematics
2 answers:
kodGreya [7K]3 years ago
5 0

3 and 9: 39 and 93

4 and 8: 48 and 84

5 and 7: 57 and 75

Shkiper50 [21]3 years ago
4 0

The original number could be 57 because 75 > 57. But it could also be 39 or 48.

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Solving Quadratic Equations using the Square Root Property
Afina-wow [57]

Answer:

x = -2   or   x = -5

Step-by-step explanation:

You need to complete the square before you can take the square root of both sides.

x^2 + 7x + 10 = 0

Subtract 10 from both sides.

x^2 + 7x = -10

To complete the square, you need to add the square of half of the x-term coefficient to both sides.

The x-term coefficient is 7. Half of that is 7/2. Square it to get 49/4. Now we add 49/4 to both sides of the equation.

x^2 + 7x + \dfrac{49}{4} = -10 + \dfrac{49}{4}

(x + \dfrac{7}{2})^2 = -\dfrac{40}{4} + \dfrac{49}{4}

(x + \dfrac{7}{2})^2 = \dfrac{9}{4}

Now we use the square root property, if

x^2 = k, then

x = \pm \sqrt{k}

x + \dfrac{7}{2} = \pm \sqrt{\dfrac{9}{4}}

x + \dfrac{7}{2} = \pm \dfrac{3}{2}

x + \dfrac{7}{2} = \dfrac{3}{2}   or   x + \dfrac{7}{2} = -\dfrac{3}{2}

x = -\dfrac{4}{2}   or   x = -\dfrac{10}{2}

x = -2   or   x = -5

5 0
3 years ago
Find the 12th term of thsi sequence 5 12 19
enyata [817]
It's adding 7 each time. So...

5, 12, 19, 26, 33, 40, 47, 54, 61, 68, 75, and

82
4 0
3 years ago
What is the approximate length of arc QR? Round to the nearest tenth of a centimeter.
NeX [460]

Step-by-step explanation:

theta = 180 - 123 = 57 degree

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= 2 * pi * R * ( 57 / 360)

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Anthropologists can estimate the height of a woman by measuring the length of her radius bone (from the wrist to the elbow). The
zloy xaker [14]
B = 0.26 h - 18.85,
where b is the length of the radius bone and h is the height.
To find the equation for height of a woman, you can solve the equation for h.
0.26 h = b + 18.85
h = ( b + 18.85 ) / 0.26
h = ( 100 b + 1,885 ) / 26
Then you can plug in the length of the radius bone in this equation.
4 0
3 years ago
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