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3 years ago

Which of the following correctly shows the quadratic formula?

Mathematics

2 answers:

Gre4nikov [31]3 years ago

7 0

The first option is the correct quadratic formula

muminat3 years ago

3 0

Answer:

A) x = $\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}$

Step-by-step explanation:

The general form a quadratic equation y = $ax^2 + bx + c, where a \neq 0.$ .

We use quadratic formula when we find the solution of a quadratic equation.

The quadratic equation has two solutions.

x = $\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}$

Therefore, the answer is A) x = $\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}$

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A cookie recipe calls for 2 3/4 cups of chocolate chips and 1 1/3 cup of butterscotch chips. How much is needed all together for

MArishka [77]

Answer:

4 1/12

Step-by-step explanation:

2 9/12 + 1 4/12 = 4 1/12

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3 years ago

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The seasonal output of a new experimental strain of pepper plants was carefully weighed. The mean weight per plant is 15.0 pound

DanielleElmas [232]

Answer:

There are 118 plants that weight between 13 and 16 pounds

Step-by-step explanation:

For any normal random variable X with mean μ and standard deviation σ : X ~ Normal(μ, σ)

This can be translated into standard normal units by :

$Z = \frac{(X - \mu)}{\sigma}$

Let X be the weight of the plant

X ~ Normal( 15 , 1.75 )

To find : P( 13 < X < 16 )

$= P(\frac{( 13 - 15 )}{1.75} < Z < \frac{( 16 - 15 )}{1.75})$

= P( -1.142857 < Z < 0.5714286 )

= P( Z < 0.5714286 ) - P( Z < -1.142857 )

= 0.7161454 - 0.1265490

= 0.5895965

So, the probability that any one of the plants weights between 13 and 16 pounds is 0.5895965

Hence, The expected number of plants out of 200 that will weight between 13 and 16 = 0.5895965 × 200

= 117.9193

Therefore, There are 118 plants that weight between 13 and 16 pounds.

4 0

3 years ago

If the product of a number and negative −3 is subtracted from the number, the result is 11 more than the number. find the numbe

Ierofanga [76]

The answer would be 2.2.

This sentence as an expression would be n - (-3n) = n + 11.
Solve it and you'll get 2.2!

8 0

3 years ago

-6/13 - (-7/15)<br> pls solve it for me !!! :)

MAXImum [283]

Answer:

First, make the double negative a positive.

So, (-6/13) + (7/15)

Then multiply the numerator, 6×7=42

And denominator 13×15=195

42/195 simplify by dividing both by 3 so 14/65

8 0

2 years ago

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The vertex of this parabola is at 2, -1 When the y-value is 0 the x value is 5 what is the coefficient of the squared term in th

Olegator [25]

Answer:

$\large \boxed{\sf \frac{1}{9}}$

Step-by-step explanation:

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

$\sf Vertex = (h,k)$

y-value is 0 and the x value is 5

h = 2

k = -1

$\sf 0=a(5-2)^2+-1$

Solve for $\sf a$ (the coefficient of the squared term).

$\sf 0=a(3)^2+-1$

$\sf 0=9a-1$

$\sf 9a=1$

$\displaystyle \sf a=\frac{1}{9}$

The coefficient of the squared term in the parabola equation is 1/9.

8 0

2 years ago

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