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3 years ago

Will mark brainliest.

Mathematics

1 answer:

Lana71 [14]3 years ago

3 0

Answer:

I couldnt figure out the irregular polygons, so im sorry

Step-by-step explanation:

$A=wl=7*2=14in^2\\P=2(l+w)=2*(2+7)=18in$

$P=8a=8*3=24cm$

$A=wl=40*97=3880mm^2\\P=2(l+w)=2*(97+40)=27mm$

$A=wl=4*13=52cm^2\\P=2(l+w)=2*(13+4)=34cm$

$A=wl=3*8=24cm^2\\A=wl=2*6=12cm^2\\=36cm^2\\P=2(l+w)=2·(8+3)=22cm\\P=2(l+w)=2*(2+6)=16cm\\=38cm$

$A=wl=4*9=36cm^2\\A=wl=8*3=24cm^2\\=60cm^2\\P=2(l+w)=2*(4+9)=26cm\\P=2(l+w)=2*(8+3)=22cm\\=48cm$

$A=wl=7*11=77cm^2\\A=wl=2*5=10cm^2\\=87cm^2\\P=2(l+w)=2*(7+11)=36cm\\P=2(l+w)=2*(2+5)=14cm\\=50cm$

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Use the table to work out the values of a , b , c , and d .

slavikrds [6]

Answer:

a = 10, b = 6, c = 2, d = 0

Step-by-step explanation:

Substitute the appropriate values of x into the equation and evaluate

x = - 3 : y = 4 - 2(- 3) = 4 + 6 = 10 → a

x = - 1 : y = 4 - 2(- 1) = 4 + 2 = 6 → b

x = 1 : y = 4 - 2(1) = 4 - 2 = 2 → c

x = 2 : y = 4 - 2(2) = 4 - 4 = 0 → d

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3 years ago

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What does 7^x=21 in a logarithmic equation

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Loga x=n ⇔ a^n=x
log₇ 21=x

x=log ₇ 21
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Answer: x=log₇ 21

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3 years ago

Use the estimate in the text based on the Prime Number Theorem to give approximate values of the following. (a) The number of pr

ozzi

Answer:

a)148.47

b)148.34

Step-by-step explanation:

Let π(x) be the prime-counting function that gives the number of primes less than or equal to x, for any real number x. For example, π(7) = 4 because there are four prime numbers (2, 3, 5, 7) less than or equal to 7.

We can see that π(7)=π(10) because there are four prime numbers (2,3,5,7) less than or equal to 10.

A good aproximation for π(x) is x / log x, where log x is the natural logarithm of x.

a)The number of primes between 1 and 1030.

1030/log(1030)=148.47

b) The number of primes between 1 and 1029.

1029/log(1029)=148.34

Extra: π(1029)=π(1030) because 1030 is not a prime.

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4 years ago

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She will only have to sell 40 cakes to earn $200

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4 years ago

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Monica [59]

Answer:

$\mu = 250, \sigma = 175.781$

Step-by-step explanation:

Previous concepts

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The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the grades of a population, and for this case we know the distribution for X is given by:

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