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Masja [62]
2 years ago
11

I need help with math!!!

Mathematics
2 answers:
weeeeeb [17]2 years ago
7 0

Answer:

That will be (A.) 144

Step-by-step explanation:

It's quite easy

The way I do it is by doing

4 x 36 which will equal 144

If you want to check it than do

144/4  and if it equals to 36 than the equation is true

114/4=36

X=144

Another example is x/5 = 150

Step 1: 5 x 150 = 750

Check: 750/5 = 150

X=750

Katyanochek1 [597]2 years ago
5 0
The answer is : A. 144
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For what value of c does x^2−2x−c=4 have exactly one real solution?<br> PLEASE HELP!!!!!!!
Paul [167]

Answer:

-5

Step-by-step explanation:

Moving all terms of the quadratic to one side, we have

x^2-2x-(c+4)=0.

A quadratic has one real solution when the discriminant is equal to 0. In a quadratic ax^2+bx+d, the discriminant is \sqrt{b^2-4ad}.

(The discriminant is more commonly known as \sqrt{b^2-4ac}, but I changed the variable since we already have a c in the quadratic given.)

In the quadratic above, we have a=1, b=-2, and d=-(c+4). Plugging this into the formula for the discriminant, we have

\sqrt{(-2)^2-4(1)(-(c+4)).

Using the distributive property to expand and simplifying, the expression becomes

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Setting the discriminant equal to 0 gives

2\sqrt{c+5}=0.

We can then solve the equation as usual: first, divide by 2 on both sides:

\sqrt{c+5}=0.

Squaring both sides gives

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and subtracting 5 from both sides, we have

\boxed{c=-5}.

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Answer:

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Step-by-step explanation:

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