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Yuki888 [10]
3 years ago
11

Find the value of c that completes the square

Mathematics
1 answer:
coldgirl [10]3 years ago
3 0

Answer:

The value of c is 1/2

Step-by-step explanation:

We have to find the value of c that completes the square  x^2-x+c

So, completing square is of form: a^2-2ab+b^2=(a-b)^2

In the question given the value c can be found by breaking the middle term. we are given -x while the general formula is 2ab for middle term so, our c = 1/2 i.e 2(x)(1/2) we get x so, solving:

x^2-x+c\\=x^2-2(x)(\frac{1}{2})+(\frac{1}{2})^2-(\frac{1}{2})^2\\=(x-\frac{1}{2})^2-(\frac{1}{2})^2

The value of c is 1/2

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Help me do examples for a function and a non function
bekas [8.4K]

Answer:

{(1,2) (3,4) (5,6)} and {(1,2) (1,4) (5,6)}

Step-by-step explanation:

you really want to think of a function as a vending machine. if you press B12 on a vending machine because thats where the chips are, only the chips should come out. in a function, the input value aka x (B12, what youre putting in) should only have one output value aka y, (the chips)

an example of a function would be {(1,2) (3,4) (5,6)}

an important thing to remember is that one output value can belong to multiple input values. there can be chips (output) in both B12 and C12 (inputs) BUT as i said before, there CANNOT be two outputs for one input. B12 cannot give you both chips and a drink.

using this, another example of a function would be {(1,2) (3,2) (5,2)}

an example of an non function would be {(1,2) (1,4) (5,6)} because x, the input value, has multiple output values which is not possible. the output of 1 can not be 2 and 4 at the same time which we can see in the (x,y) coordinates.

4 0
3 years ago
In a science test devi scores 15 marks more than lixin . If devi obtains twice as many marks as lexin . Find the number of marks
BabaBlast [244]

Answer:

Lixin obtains 15 marks

Step-by-step explanation:

Lets write two equations based on the question where: <u>D= Devi and L=Lixin</u>

D=L+15 <em>- "devi scores 15 marks more than lixin"</em>

D=2L <em>- "devi obtains twice as many marks as lexin"</em>

Now, substitute 2L as D in the first equation we wrote: (D=L+15)

2L=L+15

Next, subtract L from both sides:

<u>L=15</u>

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4 years ago
Find the area of the triangle with a base of 9 and a height of 15.... helllpppp
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Answer:

The answer is first point, A = 67.5units²

Step-by-step explanation:

Given that the area of triangle is (1/2)×base×height. So use this formula to find the area :

base = 9units

height = 15units

Area = (1/2)×9×15

= 67.5units²

8 0
3 years ago
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