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Elanso [62]
3 years ago
5

Read is solving the quadratic equation 0 equals X over two minus 2X -3 using the quadratic formula which shows the correct subst

itution of the values ABC into the quadratic formula quadratic formula X equals negative B+
Mathematics
1 answer:
hammer [34]3 years ago
8 0

Answer:

x = \frac{-(-2) \± \sqrt{(-2)^2 - 4*1*-3}}{2*1}

Step-by-step explanation:

Given

0 = x^2 - 2x -3

Required

The correct quadratic formula for the above

A quadratic equation is represented as:

ax^2 + bx + c = 0

And the formula is:

x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}

So, we have:

0 = x^2 - 2x -3

Rewrite as:

x^2 - 2x - 3 = 0

By comparison:

a= 1; b = -2; c = -3

So, we have:

x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}

x = \frac{-(-2) \± \sqrt{(-2)^2 - 4*1*-3}}{2*1}

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Answer:

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Step-by-step explanation:

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3 0
3 years ago
Which ratio is equivalent to 12 over 14
Alecsey [184]
12/14=6/7

Because you divide by 2. 
5 0
4 years ago
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What does 7(x+1/7) equal
Helen [10]

Answer:

x + 1

Step-by-step explanation:

7 (x + 1/7)

Use distributive property to get rid of the parentheses.

7x + 7/7

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4 0
3 years ago
Sparky the Bear is atop a 100 foot tower. He is looking out over a fairly level area for careless people who might start fires.
Bogdan [553]

The distance of sparky to the fire is 99.445 feet

<h3>Application of SOH CAH TOA identity</h3>

Given the following parameters

The angle of depression = 6  degrees

If Sparky is looking over the fairly level, hence the hypotenuse is 100 foot

Required

Distance from spark tower to the fire

Using the expression below

Cos 6 = D/100

D = 100cos6

D = 100(0.9945)
D = 99.45foot

Hence the distance of sparky to the fire is 99.445 feet

Learn more on SOH CAH TOA here: brainly.com/question/20734777

3 0
2 years ago
Can someone Help please? :)
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the answer is 24i-7 she forgot to multiply 3 and 4 two times to distribute

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