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Harlamova29_29 [7]
2 years ago
9

4. Ideal amount of children

Mathematics
1 answer:
Vaselesa [24]2 years ago
3 0

Answer:

3

Step-by-step explanation:

Formula:

\frac{sum of all numbers added together}{total amount of numbers}

\frac{21}{7} = 3

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Rewrite the equation by completing the square.<br> 4x2 + 28x + 49 = 0<br> (x+) =
Vlada [557]

Answer: x = - 3.5

Step-by-step explanation:

Rewrite the equation by completing the square.

4x2 + 28x + 49 = 0

Completing the square method :

Divide through by the Coefficient of x^2

x^2 + 7x + (49/4) = 0

a = 1, b = 7, c = 49/4

Move c to the right side of the equation

x^2 + 7x = - 49/4

Complete the square on the left hand side by squaring its half of the x term

(7/2)^2 = (49/4)

Add the output to both sides of the equation

x^2 + 7x + (49/4) = - (49/4) + (49/4)

(x + 7/2)^2 = 0

Square root of both sides

x + 7/2 = 0

x = - 7/2

x = - 3.5

4 0
3 years ago
I bet you want Brainlest!! Click HERE!!!<br> Please help me!!!<br> BRaNiElsT!!!!!<br> Click!!!
saw5 [17]

Answer:

B) X = 90

Step-by-step explanation:

If you plug in every answer choice as "X," you can easily find which answer helps the equation equal 40.

EX. 1/2 (or 0.50) times 90 plus -4 equals 41!

Equation with "X" filled in as 90 :

41 = 1/2 x 90 + (-4)!!!

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3 years ago
695 -7x = 140<br> What is the value of x?
Sphinxa [80]

Hello!

695 - 7x = 140

-7x = 140 - 695

-7x = -555

-x = -79.29

x = 79.29

I hope this helps you! Have a lovely day!

- Mal

5 0
3 years ago
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What is 26-12+29 equal
leonid [27]

Answer:

43

Step-by-step explanation:


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3 years ago
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liq [111]
1-1-) 6,10,15, 100
1(,5,4)
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