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3 years ago

Helppp Meeee Plzzzzz

Mathematics

1 answer:

sveticcg [70]3 years ago

7 0

Blue triangle is 1/4, the green triangle is 3/2, and red is 2/8

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Helpppp Pleaseee....

NeX [460]

Answer:

$\frac{4 \sqrt{10} }{5}$

Step-by-step explanation:

$\frac{8}{ \sqrt{10} } \times \frac{ \sqrt{10} }{ \sqrt{10} }$

$\frac{8 \sqrt{10} }{ {\sqrt{10}}^{2} }$

$\frac{8 \sqrt{10} }{10}$

$\frac{4 \sqrt{10} }{5}$

3 0

3 years ago

Read 2 more answers

Write an algebraic expression for the phrase.<br><br> the sum of f and 6

Wittaler [7]

Answer:

f+6

f+6 =(f+6)

6 0

3 years ago

If AD is an altitude of triangle ABC, then angle ABC is:

alexira [117]

<ADB = 90 degrees

hope it helps

7 0

3 years ago

In a population of similar households, suppose the weekly supermarket expense for a typical household is normally distributed wi

Rina8888 [55]

Answer:

P(Y ≥ 15) = 0.763

Step-by-step explanation:

Given that:

Mean =135

standard deviation = 12

sample size n = 50

sample mean $\overline x$ = 140

Suppose X is the random variable that follows a normal distribution which represents the weekly supermarket expenses

Then,

$X \sim N ( \mu \sigma)$

The probability that X is greater than 140 is :

P(X>140) = 1 - P(X ≤ 140)

$P(X>140) = 1 - P( \dfrac{X-\mu}{\sigma} \leq \dfrac{140-135}{12})$

$P(X>140) = 1 - P( \dfrac{X-\mu}{\sigma} \leq \dfrac{5}{12})$

$P(X>140) = 1 - P( Z\leq0.42)$

From z tables,

$P(X>140) = 1 - 0.6628$

$P(X>140) = 0.3372$

Similarly, let consider Y to be the variable that follows a binomial distribution of the no of household whose expense is greater than $140

Then;

$Y \sim Binomial (np)$

$Y \sim Binomial (50,0.3372)$

∴

P(Y ≥ 15) = 1- P(Y< 15)

P(Y ≥ 15) = 1 - ( P(Y=0) + P(Y=1) + P(Y=2) + ... + P(Y=14) )

$P(Y \geq 15) = 1 - \begin {pmatrix} ^{50}_0 \end {pmatrix} (0.3372)^0 (1-0,3372)^{50} + \begin {pmatrix} ^{50}_1 \end {pmatrix} (0.3372)^1 (1-0,3372)^{49} + \begin {pmatrix} ^{50}_2 \end {pmatrix} (0.3372)^2 (1-0,3372)^{48} +... + \begin {pmatrix} ^{50}_{50{ \end {pmatrix} (0.3372)^{50} (1-0,3372)^{0}$

P(Y ≥ 15) = 0.763

7 0

3 years ago

HELP PLEASE!

masha68 [24]

Answer:

5.0-2.5=2.5

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers