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Alinara [238K]
2 years ago
15

What can’t talk but will reply when spoken to?​

Mathematics
2 answers:
Alinara [238K]2 years ago
8 0

Answer:

<em>An </em><em>echo</em>

Step-by-step explanation:

................

mel-nik [20]2 years ago
3 0

Answer:

An echo

<h2>hope it helps you<3</h2>
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Solve the system of equations shown. Write your answer as an order pair. (x,y) *
Assoli18 [71]

Answer:

x=2 y=5

Step-by-step explanation:

is this right

3 0
3 years ago
Plz help me I suck at math
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My Answer is 10
your welcome
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4 years ago
The polynomial x3 + 8 is equal to (x + 2)(x2 – 2x + 4). (x – 2)(x2 + 2x + 4). (x + 2)(x2 – 2x + 8). (x – 2)(x2 + 2x + 8).
Maslowich

Use\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\x^3+8=x^3+2^3=(x+2)(x^2+2x+2^2)\\\\=\boxed{(x-2)(x^2+2x+4)}

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3 years ago
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What two number multiply to negative 20 and add to 19
OLEGan [10]
x;\ y-the\ numbers\\\\  \left\{\begin{array}{ccc}xy=-20\\x+y=19&\Rightarrow&x=19-y\end{array}\right\\\\subtitute\ to\ first\ equation:\\\\(19-y)y=-20\\19y-y^2+20=0\\-y^2+19y+20=0\ \ \ |change\ signs\\y^2-19y-20=0\\y^2-20y+y-20=0\\y(y-20)+1(y-20)+0\\(y-20)(y+1)=0\iff y-20=0\ or\ y+1=0\\\\y=20\ or\ y=-1

x=19-y\\\\for\ y=20\Rightarrow x=19-20=-1\\\\for\ y=-1\Rightarrow x=19-(-1)=20\\\\Answer:\boxed{\boxed{20\ and\ -1}}
4 0
4 years ago
25 POINTS <br> Solve this equation PLEASE AND STEPS<br> 4=1/2(2x+4+x)(x-2)
Keith_Richards [23]

Answer:

x=−2, 2.6666

Step-by-step explanation:

Let's solve your equation step-by-step.

4=(1/2(2x+4+x))(x−2)

Step 1: Simplify both sides of the equation.

4=3/2 x2−x−4

Step 2: Subtract 3/2x^2-x-4 from both sides.

4−(3/2 x2−x−4)=

3/2 x2−x−4−(3/2 x2−x−4)

−3/2 x2 +x+8=0

For this equation: a=-1.5, b=1, c=8

−1.5x2+1x+8=0

Step 3: Use quadratic formula with a=-1.5, b=1, c=8.

x=−b±√b2−4ac

2a

x=−(1)±√(1)2−4(−1.5)(8)

2(−1.5)

x=−1±√49

−3

x=−2,2.66666666666666666666666666666

5 0
3 years ago
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