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lakkis [162]
2 years ago
15

your teacher is trying to demonstrate a probability concept and is running out of ideas. she creates three bags and fills them w

ith 20 scrabble tiles
Mathematics
2 answers:
Alexxandr [17]2 years ago
8 0

Answer: If she has three bags, and each have 20.. then it would be 60 scrabble tiles all together

Step-by-step explanation:

because 20+20+20 = 60 I hope this helps.. i was not sure what u were asking so if u need more help please ask!

grigory [225]2 years ago
5 0

Answer:

in the first bag there is 12

I got this answer from another website just copy and paste your question online and it will show up on itprospt.com

Step-by-step explanation:

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A fraction becomes 4÷5 if 1 is added to both numerator and denominator. If, however, 5 is subtracted from both numerator and den
tia_tia [17]

Answer:

\dfrac{7}{9}

Step-by-step explanation:

\dfrac{x+1}{y+1}=\dfrac{4}{5}\\\Rightarrow 5x-4y=-1

\dfrac{x-5}{y-5}=\dfrac{1}{2}\\\Rightarrow 2x-y=5

Putting it in matrix form

\begin{bmatrix}a_{1}&b_{1}\\a_{2}&b_{2}\end{bmatrix}{\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}{c_{1}}\\{c_{2}}\end{bmatrix}\\\Rightarrow\begin{bmatrix}5 & -4\\2 & -1\end{bmatrix}\begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}-1\\ 5\end{bmatrix}

From Cramer's rule we have

x=\dfrac{\begin{vmatrix}c_1 &b_1 \\ c_2 & b_2\end{vmatrix}}{\begin{vmatrix}a_1 &b_1 \\ a_2& b_2\end{vmatrix}}\\\Rightarrow x=\dfrac{\begin{vmatrix}-1 &-4 \\ 5 & -1\end{vmatrix}}{\begin{vmatrix}5 &-4 \\ 2& -1\end{vmatrix}}\\\Rightarrow x=\dfrac{1+20}{-5+8}\\\Rightarrow x=7

y=\dfrac{\begin{vmatrix}a_1 &c_1 \\ a_2 & c_1\end{vmatrix}}{\begin{vmatrix}a_1 &b_1 \\ a_2& b_2\end{vmatrix}}\\\Rightarrow y=\dfrac{\begin{vmatrix}5 &-1 \\ 2 & 5\end{vmatrix}}{\begin{vmatrix}5 &-4 \\ 2& -1 \end{vmatrix}}\\\Rightarrow y=\dfrac{25+2}{-5+8}\\\Rightarrow y=9

Verifying the results

\dfrac{7+1}{9+1}=\dfrac{8}{10}=\dfrac{4}{5}

\dfrac{7-5}{9-5}=\dfrac{2}{4}=\dfrac{1}{2}

Hence, the fraction is \dfrac{7}{9}.

6 0
3 years ago
Find the circumference of the circle.
OLga [1]

Circumference (C) = 2 π·r   ; where r is the radius = diameter(d)/2

C = 2 π·(14/2)

  =2 π·(7)

  = 14π

3 0
3 years ago
Read 2 more answers
PLEASE HELPP!!
likoan [24]

Answer:

A: s=75w

B: s= 75(16)

s=1200

Step-by-step explanation:

6 0
4 years ago
A gardener is installing fence around his garden. Let x represent the width of the garden, in feet. The perimeter of the garden
ivanzaharov [21]

Answer:

 (8) x+8  in (8)

Step-by-step explanation:

width times length

3 0
3 years ago
If 5 workers can build 5 cars in 5 days how many days would it take for 7 workers to build 7 cars
ale4655 [162]

Answer:

7 days

Step-by-step explanation:

It would also take 7 days

3 0
3 years ago
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