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2 years ago

What number would you add to both sides of x2 + 7x = 4 to complete the square? o 22

Mathematics

1 answer:

Vika [28.1K]2 years ago

4 0

Answer:

49/4

Step-by-step explanation:

x^2 + 7x = 4

Take the coefficient of x

Divide by 2

7/2

Square it

(7/2) ^2 = 49/4

Add this to each side

x^2 + 7x +49/4= 4+49/4

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2 years ago

In order to join the football club, you have to pay a 120 Dirhams joining fee and pay 200

Sergio039 [100]

Answer:

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Step-by-step explanation:

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2 years ago

For students who first enrolled in two year public institutions in a recent semester, the proportion who earned a bachelor's d

kondaur [170]

Answer:

Null hypothesis = $H_0:p=0.395$

Alternate hypothesis = $H_a:p>0.395$

Step-by-step explanation:

Given : In a recent semester, the proportion who earned a bachelor's degree within six years was 0.395.

The president of a certain college believes that the proportion of students who enroll in her institution have a higher completion rate.

To Find : Determine the null and alternative hypotheses.

Solution:

In a recent semester, the proportion who earned a bachelor's degree within six years was 0.395.

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So,null hypothesis = $H_0:p=0.395$

Alternate hypothesis = $H_a:p>0.395$

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2 years ago

Which equations are true for x = –2 and x = 2? Select two options

fomenos

Answer:

Number 1 and Number 4

Step-by-step explanation:

By factoring, you can figure out the roots (x = -2 or x = 2)...

1. x^2 - 4 = 0

--> (x + 2)(x - 2) = 0

--> x = -2, x = 2

2. x^2 + 4 = 0

--> factors weirdly, so I won't write it. You'd have to use the quadratic formula.

3. 3x^2 + 12 = 0

--> 3 (x^2 + 4) = 0

--> factors weirdly (same as above)

4. 4x^2 - 16 = 0

--> 4 (x^2 - 4) = 0

--> 4 (x+2) (x-2) = 0

--> x = -2, x = 2

5. 2 (x-2) 2 = 0

--> x = 2

7 0

1 year ago