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2 years ago

Hhshjsjdjsbzbjajsjjdbzbannenxbzbbandbsbnanandnz

Mathematics

2 answers:

Pachacha [2.7K]2 years ago

8 0

Nice keyboard spam and free points

exis [7]2 years ago

4 0

Answer:

rfrjbgithbgihebgherhghtigbihebg

Step-by-step explanation:

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Which expression represents the inverse of y = 12x - 3

a_sh-v [17]

y = x + 3 / 12
This is your answer.

4 0

2 years ago

Read 2 more answers

assume that when adults with smartphones are randomly selected 15 use them in meetings or classes if 15 adult smartphones are ra

Tanzania [10]

Answer:

The probability that at least 4 of them use their smartphones is 0.1773.

Step-by-step explanation:

We are given that when adults with smartphones are randomly selected 15% use them in meetings or classes.

Also, 15 adult smartphones are randomly selected.

Let X = Number of adults who use their smartphones

The above situation can be represented through the binomial distribution;

$P(X = r) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r} ; n = 0,1,2,3,.......$

where, n = number of trials (samples) taken = 15 adult smartphones

r = number of success = at least 4

p = probability of success which in our question is the % of adults

who use them in meetings or classes, i.e. 15%.

So, X ~ Binom(n = 15, p = 0.15)

Now, the probability that at least 4 of them use their smartphones is given by = P(X $\geq$ 4)

P(X $\geq$ 4) = 1 - P(X = 0) - P(X = 1) - P(X = 2) - P(X = 3)

= $1- \binom{15}{0}\times 0.15^{0} \times (1-0.15)^{15-0}-\binom{15}{1}\times 0.15^{1} \times (1-0.15)^{15-1}-\binom{15}{2}\times 0.15^{2} \times (1-0.15)^{15-2}-\binom{15}{3}\times 0.15^{3} \times (1-0.15)^{15-3}$

= $1- (1\times 1\times 0.85^{15})-(15\times 0.15^{1} \times 0.85^{14})-(105 \times 0.15^{2} \times 0.85^{13})-(455 \times 0.15^{3} \times 0.85^{12})$

= 0.1773

3 0

3 years ago

Frank bought 349 acres of land for a housing development. If 16 acres of his purchase is reserved for a community center, how ma

Gelneren [198K]

First we will subtract 16 acres from total land 349 acres.
349-16=333 acres

Now divide 333 by 3
Answer will be 111 lots of 3 acres.

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3 years ago

The perimeter of a rectangular field is 324 yards. If the length of the field is 91 yards, what is its width?

nekit [7.7K]

I think its 71. I'm not completely sure because from what ive learned it would be that.

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3 years ago

There are 150 calories in a cup of whole milk and only 80 in a cup of skim milk. In switching to skim milk, find the percent dec

ss7ja [257]

Answer:

53.3%

Step-by-step explanation:

80/150=160/300

160/300=53.33/100

The decrease in calories is 53.3%

5 0

2 years ago