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Oduvanchick [21]

3 years ago

12

The side of square whose parimeter is 20m

1 answer:

Lera25 [3.4K]3 years ago

6 0

Take 20 and divide it by 4 and you get 5mm squared .
There are four sides so take the total which is 20 mm and divide it by the sides to get one side.
Answer is 5mm squared

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What is the simplified expression for the expression below?

kotykmax [81]

Answer:

A

Step-by-step explanation:

- 1/5 of 5x is -1 or just -x and -1/5 of 20 is -4. Then the other one is-1/4 of 4 is -x and -1/4 of -28 is 7. Now combine like terms so -x + -x is -2x and 7+ -4 or 7-4 is 3

8 0

3 years ago

In a game of checkers there are 12 red pieces and 12 black game pieces.Julio is setting up the board to begin playing. what is t

Bond [772]

Since there are equal numbers of pieces, the chances of Julio getting a red on the first pull is 12/24 or 1/2 (reduced)

However on the second pull there are only 11 reds (Julio pulled one out) out of 23 remaining pieces so the chances of pulling the second red are 11/23

Now multiply those possibilities:
1/2 x 11/23 and you will get 11/46 which is the probability of pulling two reds in a row. 11/46 is the answer.

4 0

3 years ago

Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

<u>Completing the square</u>

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

5 0

2 years ago

How does understanding place value help you to subtract across zeros?

Alex_Xolod [135]

Oh it helps because a zero could count as a number when you write it down but it doesn't seem that way when u say it

6 0

3 years ago

Solve for x ~<br><img src="https://tex.z-dn.net/?f=6x%20-%2036%20%3D%2012" id="TexFormula1" title="6x - 36 = 12" alt="6x - 36 =

Shtirlitz [24]

$\large \tt \: \: \: \: \: \: ⇝ \: 6x - 36 = 12$

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$\large \tt \: \: \: \: \: \: ⇝ 6x = 12 + 36$

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$\large \tt \: \: \: \: \: \: ⇝ 6x = 48$

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$\large \tt \: \: \: \: \: \: ⇝ \:x = \cancel\frac{48}{6}$

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$\boxed{ \large \bf \color{purple} \: \: \: \: \: ⇝ \:x = 8}$

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-_- Hope Helps!¡!¡!¡!¡!

7 0

2 years ago

Read 2 more answers