3 years ago

The 2s in 6,228 was

Mathematics

1 answer:

barxatty [35]3 years ago

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Hundreds place and tenths place

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Eli walked 12 feet down the hall of his house to get to the door. He continued in a straight line out of the door and across the

tekilochka [14]

Part A:

The drawing representing Eli's walking pattern is attached.

Part B:
The total distance worked by Eli is given by
12 + 32 + 14 = 58 feet.

Part C:
The distance of Eli from his house is given by
12 + 32 - 14 = 30 feet.

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3 years ago

The temperature at 2 a.m. was -10°C.

horsena [70]

Answer:

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Step-by-step explanation:

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Derive the equation of the parabola with a focus at (6, 2) and a directrix of y = 1

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Answer:

Step-by-step explanation:

eq. of directrix is y-1=0

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then\sqrt{ (x-6)^2+(y-2)^2}=\frac{y-1}{(-1)*2}

squaring

x²-12x+36+y²-4y+4=y²-2y+1

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2 years ago

The expression 3[x-9) is equivalent to<br> 03(x)+9.<br> 03(x)+3(9)<br> O 3(%) - 9.<br> 03(x) – 3(9)

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Step-by-step explanation:

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3 years ago

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3. From the table below, find Prof. Xin expected value of lateness. (5 points) Lateness P(Lateness) On Time 4/5 1 Hour Late 1/10

wariber [46]

Answer:

The expected value of lateness $\frac{7}{20}$ hours.

Step-by-step explanation:

The probability distribution of lateness is as follows:

Lateness P (Lateness)

On Time 4/5

1 Hour Late 1/10

2 Hours Late 1/20

3 Hours Late 1/20

The formula of expected value of a random variable is:

$E(X)=\sum x\cdot P(X=x)$

Compute the expected value of lateness as follows:

$E(X)=\sum x\cdot P(X=x)$

$=(0\times \frac{4}{5})+(1\times \frac{1}{10})+(2\times \frac{1}{20})+(3\times \frac{1}{20})\\\\=0+\frac{1}{10}+\frac{1}{10}+\frac{3}{20}\\\\=\frac{2+2+3}{20}\\\\=\frac{7}{20}$

Thus, the expected value of lateness $\frac{7}{20}$ hours.

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3 years ago