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Klio2033 [76]
4 years ago
9

What 3-digit number when doubled is, by value, one more than the same 3-digit number reversed? There can be two answers.

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
3 0

Let ones digit = z

Let tens digit = y

Let hundreds digit = x

Then three digit number xyz will be equivalent to (100x+10y+z)

If we reverse the digits then new number zyx will be equivalent to (100z+10y+x)

2(100x+10y+z)=(100z+10y+x)+1

200x+20y+2z=100z+10y+x+1

199x+10y-98z-1=0

There are no more conditions given so that we can use them to minimize calculation in order to find the answer.

So now we have only choice to plug random numbers for x,y,z which can vary from 0 to 9.

Working as explained above gives x=3, y=9, z=7 is satisfying the above equation.

Hence required number is 397.

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Licemer1 [7]

Answer:

A. y = x^2 -6x + 13

Step-by-step explanation:

The parabola that opens up and has line of symmetry x=3 and a minimum at x=3  is

y=x^2-6x+13

The reason is that, we can write this function in the vertex form to get;

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8 0
3 years ago
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Amanda [17]

════════ ∘◦❁◦∘ ════════

<h3>Answer : y = ⅚x - 3</h3>

════════════════════

<h3>Known</h3>

x1 = 6

y1 = 2

x2 = (-6)

y2 = (-8)

════════════════════

<h3>Question</h3>

Equation of the line (y = mx + c)

════════════════════

<h3>Way to do</h3>

#First, you find the gradient (m)

m =  \frac{y2 - y1}{x2 - x1}  =  \frac{(( - 8) - 2)}{(( - 6) - 6)}  =  \frac{( - 10)}{( - 12)}  =  \frac{5}{6}

#Now use the formula of equation of the line

y - y1 = m(x - x1)

y - 2 = ⅚(x - 6)

y - 2 = ⅚x - 5

y = ⅚x - 5+2

y = ⅚x - 3

════════════════════

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3 years ago
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Step-by-step explanation:

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algol13

Answer:

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Step-by-step explanation:


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m_a_m_a [10]
Money is written with two places after the decimal. To round to the nearest scent, round to the hundredths place. In 0.1369 the 3 is in the hundredths place. Use the number directly after it, 6, to round. Because six is five or greater, it rounds the 3 up to 4. The answer is $0.14
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