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salantis [7]
3 years ago
11

Arbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of drinks sh

e needs to sell to earn $100. 1.25x + 1.49 = 100 What error did Barbara make in writing the equation?
Mathematics
1 answer:
pashok25 [27]3 years ago
8 0
If ice tea is lets say y (ice tea = y) and water is x (water = x) then the answer is 
1.25x + 1.49y = 100
the error is that she forgot the second variable(y).
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In a valcano, erupting lava flows continuously through a tube system about 19 kilometers to the sea. assume a lava flow speed 0.
Sunny_sXe [5.5K]

Lava flows continuously about 19 kilometers to sea if speed of  lava is 0.5 kilometer per hour then it will take 38 hours to reach the sea.

As given,

Distance covered = 19kilometers

Speed of lava = 0.5 kilometer per hour

0.5 kilometers=1 hour

⇒ 1kilometers = (1/0.5)hour

⇒ 19 kilometers = (19 / 0.5) hour

⇒ 19 kilometers = 38 hours

Therefore, lava flows continuously about 19 kilometers to the sea if speed of the lava is 0.5 kilometer per hour then it will take 38 hours to reach the sea.

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4 0
1 year ago
Define a new random variable by y = 2px. show that, as p l 0, the mgf of y converges to that of a chi squared random variable wi
Mandarinka [93]
The moment generating function (mgf) of y is given by

M_y(t)=E(e^{ty})=E(e^{2pxt})=M_x(2pt)=p(1-e^{2pt}(1-p))^{-1}

Since the momoent generating function of x is given by M_x(t)=p(1-e^{t}(1-p))^{-1}

When p tends to 0, we have

\lim_{p \to 0} M_y(t)=  \lim_{p \to 0}  \frac{p}{1-e^{2pt}(1-p)} = \frac{0}{0}

Applying L'Hopital's rule we have:

\lim_{p \to 0} M_y(t)=\lim_{p \to 0} \frac{1}{e^{2pt}+2te^{2pt}+2pte^{2pt}} = \frac{1}{1+2t} , \ \ \ t\ \textless \  \frac{1}{2}

This shows that y converges to <span>a chi squared random variable with 2r degrees of freedom</span>.
5 0
3 years ago
What is the area of the figure shown.
dimulka [17.4K]

Answer:

284.52

Step-by-step explanation:

total area = area of semi circle + area of rectangle

area of semicircle = pi r^2 /2.

= 3.14 * (12/2) ^2 ...divided by 2

= 56.52

area of rectangle = length * breadth

= 19*12

= 228

3 0
2 years ago
Read 2 more answers
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Basile [38]

Answer:

The linear relationship ( the linear equation ):

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y = 4.25 * x + 29.50

Answer:

The initial value is : ( 0,  29.50 ) or 29.50.

5 0
3 years ago
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Answer:

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4/10= .4

8 0
3 years ago
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