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3 years ago

How do you solve this algebreically? 3/8=x/20

Mathematics

1 answer:

Llana [10]3 years ago

6 0

Answer:

7.5

Step-by-step explanation:

3/8 = x/20

3(20) = 8x

8x = 60

x = 60/8

x = 7.5

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krek1111 [17]

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2 years ago

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Meg collects coins from other countries. After her mother gives her 8 coins, Meg has a total of 27 coins in her collection. How

Katarina [22]

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Do 27-8 to get 19.

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4 years ago

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Alex wants to have $2,500 in his bank account after 2 years. If the account earns 5% interest compunded 2 times per year, how mu

natka813 [3]

$A=P(1+ \frac{r}{n})^{nt}$
A=futurer amount
P=present amount
r=rate in decimal
n=number of times compounded per year
t=time in years

A=2500
r=0.05
n=2
t=2

$2500=P(1+ \frac{0.05}{2})^{(2)(2)}$
$2500=P(1+ 0.025)^{4}$
$2500=P(1.025)^{4}$
$2500=P(1.025)^{4}$
divide both sides by [tex} 1.025^{4} [/tex]
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3 years ago

Help me please with this question please .

miss Akunina [59]

If we split this shape into 2 rectangles, we have 2 rectangles that each measure 10m x 20m x 200cm. 200 cm = 2 m. Volume is found by multiplying length times width times height. We have 2 shapes so we will have 2 volumes that we will add together to get a total volume. 10*20*2=400 m cubed. Two of those is 800 m cubed.

5 0

4 years ago

Let X and Y be random variables with the following joint moment generating function: M_{X,Y}(s,t)=0.1+0.2e^s+0.3e^t+0.4e^{s+t}

MA_775_DIABLO [31]

We obtain the joint PMF directly from the joint MGF:

$M_{X,Y}(s,t)=0.1+0.2e^s+0.3e^t+0.4e^{s+t}$

$\implies\mathrm{Pr}[X=x,Y=y]=\begin{cases}0.1&\text{for }x=y=0\\0.2&\text{for }x=1,y=0\\0.3&\text{for }x=0,y=1\\0.4&\text{for }x=y=1\\0&\text{otherwise}\end{cases}$

Then

$\mathrm{Pr}[X=Y]=\mathrm{Pr}[X=Y=0]+\mathrm{Pr}[X=Y=1]=0.1+0.4=\boxed{0.5}$

8 0

3 years ago