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tangare [24]
2 years ago
12

Your sock drawer has four white socks two brown socks and six black socks. You randomly pick two socks and get a matching pair o

f black socks.
Mathematics
2 answers:
dmitriy555 [2]2 years ago
3 0
What a lucky day im having

goldenfox [79]2 years ago
3 0

Answer:

Yep

Step-by-step explanation:

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Simplify the following expression (-8)-(-6)
yulyashka [42]
First : -(-6) will turn into a positive 6
second: -8+6 which equals -2
7 0
3 years ago
What's the probability of having at least k consecutive heads?
Ksju [112]
Jjuuhhjhgy77yghuh877777uhh6y
3 0
3 years ago
I need help with number 4
Nadusha1986 [10]
\bf \begin{cases}
\quad3x+2y=-9\\
-10x+5y=-5
\end{cases}

so hmm the idea behind the elimination, is to make the value atop or below, of either variable, the same but with a negative sign

so hmmm say... we'll eliminate "y"

so... let's see, we have 2y and 5y, both positive
what do we multiply 2y to get a negative -5y, that way, -5y +5y = 0 and poof it goes

well let's see, let's try "k"     \bf 2yk=-5y\implies k=-\cfrac{5y}{2y}\implies k=-\cfrac{5}{2}

so.. if we multiply 2y by -5/2, we'll end up with -5y

well, let's multiply that first equation then by -5/2

\bf \begin{array}{rllll}
3x+2y=-9&\qquad\times -\frac{5}{2}\implies &-\frac{15}{2}x-5y=\frac{45}{2}\\\\
-10x+5y=-5&\implies &-10x+5y=-5\\
&&---------\\
&&\frac{-35}{2}x+0\quad=\frac{35}{2}
\end{array}\\\\
-----------------------------\\\\
\cfrac{-35}{2}x=\cfrac{-35}{2}\implies \cfrac{-35x}{2}=\cfrac{-35}{2}\implies x=\cfrac{2}{-35}\cdot \cfrac{-35}{2}
\\\\\\
\boxed{x=1}

so.. now we know x = 1.... so let's plug that in  say hmmm 2nd equation

\bf -10(1)+5y=-5\implies -10+5y=-5\implies 5y=5\implies\boxed{ y=1}
3 0
3 years ago
at 6:00 a.m., the temperature is 58°. At 2:00 p.m., temperature is 76°. Find the rate of change in degrees per hour during this
lesya [120]

Answer:

The rate of change is of 2.25 degrees per hour.

Step-by-step explanation:

The rate of change in degrees per hour is given by by the change in temperature divided by the change in time(by number of hours).

In this question:

From 6 am to 2 pm, there are 12 - 6 + 2 - 0 = 6 + 2 = 8 hours

The change in temperature was of 76 - 58 = 18º

Rate of change:

18º/8 = 2.25º

The rate of change is of 2.25 degrees per hour.

6 0
2 years ago
Write a pair of fractions whose product is <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B15%7D%20" id="TexFormula1" titl
Nuetrik [128]
Remember
a/b times c/d=(ac)/(bd)

basically
x/y times c/d such that x times c=8 and y times d=15
exampes

8/1 times 1/15
2/1 times 4/15
4/1 times  2/15
8/3 times 1/5
2/3 times 4/5
4/3 times 2/5
8/5 times 1/3
2/5 times 4/3
4/5 times 2/3

5 0
3 years ago
Read 2 more answers
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