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Radda [10]
3 years ago
14

Một lô hàng có 6 chính phẩm và 4 phế phẩm, lấy ngẫu nhiên 2 sản phẩm. tìm kỳ vọng của số chính phẩm

Mathematics
1 answer:
lana66690 [7]3 years ago
4 0

Answer:

I'm sorry I didn't understand

Step-by-step explanation:

sorry

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What is the volume of this?
OLga [1]

Answer:

<em>270 m³ </em>

Step-by-step explanation:

A_{triandle} = \frac{5*12}{2} = 30 m²

V_{triangular prism} = 30 × 9 = <em>270 m³</em>

8 0
2 years ago
Number 17... please help!
son4ous [18]
<span><span><span><span>2<span>y2</span></span>+y</span>−10</span>=0</span>Step 1: Factor left side of equation.<span><span><span>(<span><span>2y</span>+5</span>)</span><span>(<span>y−2</span>)</span></span>=0</span>Step 2: Set factors equal to 0.<span><span><span><span>2y</span>+5</span>=<span><span><span>0<span> or </span></span>y</span>−2</span></span>=0</span><span><span>y=<span><span><span><span>−5</span>2</span><span> or </span></span>y</span></span>=2</span>Answer:<span><span>y=<span><span><span><span>−5</span>2</span><span> or </span></span>y</span></span>=<span>2</span></span>
4 0
3 years ago
What is (-24)-(-65)=
erica [24]

Answer:

41

Step-by-step explanation:

=(-24)-(-65)

= -24 + 65

= 65-24

= 41

8 0
2 years ago
Read 2 more answers
Daniel is three years older than twice his brother's age. Daniel is 17. Fill in the box with the expression that represents the
masha68 [24]
Daniel's age is X
Daniel's brother age is Y

X = 3 + ( 2Y )

Y = ( X - 3 ) / 2

In case of Daniel is 17

then his brother's age is = ( 17 - 3 ) / 2 = 7 years
4 0
3 years ago
What is the slope of a line that is perpendicular to the line whose equation is 2x + y = 4
wel

The slope of the line of the equation given is -2 (by solving for y, you get y = -2x+4).


So, in order to be perpendicular, you must take the negative reciprocal.

The slope would be -1/2.

6 0
3 years ago
Read 2 more answers
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