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2 years ago

Increase 50 kg by 10%

Mathematics

2 answers:

PolarNik [594]2 years ago

5 0

10% of 50kg is 5kg
50kg add 5kg is 55kg
=55kg

Alika [10]2 years ago

5 0

If it decreased ⬇
10 - 50/ 50 (100)
That'll give you -40 / 50 (100)
Then,0.8 (100)
Answer: 80%

Then if it increased⬇
50 - 10 / 10 (100)
40 / 10 (100)
4(100)
400% would be your answer

The other reason⬇
10(50)
10 ÷ 50 = .1
.1(50)
Answer: 5
-----------------------------------------------
Then, again your answer could be : 55

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Answer:

$A.\ y = x^2 - 6x + 13$ is the correct answer.

Step-by-step explanation:

We know that vertex equation of a parabola is given as:

$y = a(x-h)^2+k$

where $(h,k)$ is the vertex of the parabola and

$(x,y)$ are the coordinate of points on parabola.

As per the question statement:

The parabola opens upwards that means coefficient of $x^{2}$ is positive.

Let $a = +1$

Minimum of parabola is at x = 3.

The vertex is at the minimum point of a parabola that opens upwards.

$\therefore$ $h = 3$

Putting value of a and h in the equation:

$y = 1(x-3)^2+k\\\Rightarrow y = (x-3)^2+k\\\Rightarrow y = x^2-6x+9+k$

Formula used: $(a-b)^2=a^{2} +b^{2} -2\times a \times b$

Comparing the equation formulated above with the options given we can observe that the equation formulated above is most similar to option A.

Comparing $y = x^2 - 6x + 13$ and $y = x^2-6x+9+k$

13 = 9+k

k = 4

Please refer to the graph attached.

Hence, correct option is $A.\ y = x^2 - 6x + 13$

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