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3 years ago

Please help me please i really need help please

Mathematics

2 answers:

VashaNatasha [74]3 years ago

7 0

The answer is
a = 4
b = -1

Kryger [21]3 years ago

6 0

A=4
b=-1 they were right

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goldenfox [79]

Answer:x=-2,-4

Step-by-step explanation:

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3 years ago

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What is 29232352 x 234525526252

nikklg [1K]

Answer:

6.8557327e+18

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4 years ago

A rectangular bench top is a wooden plank with an area of 8 square feet. The width of the bench top is 2 feet less than its leng

Firdavs [7]

area of rectangle = L x w

area = 8 sq ft

w= L-2

so 8 = L *L-2

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3 years ago

Workers are loading boxes onto a truck. So far, they have loaded 48 boxes onto the truck

Talja [164]

Answer:

1,200 total on truck

Step-by-step explanation:

48=4% loaded on a truck and they have 96% left to load

So set up a proportion and it should look like this

48 over x = 4 over 100

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=1,200 total on truck

Hope this helps, have a nice day! :D

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3 years ago

Based on a poll, 60% of adults believe in reincarnation. Assume that 5 adults are randomly selected, and find the indicated p

vlabodo [156]

Answer:

There is a 25.92% probability that exactly 4 of the selected adults believe in reincarnation.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they believe in reincarnation, or they do not believe. This means that we can solve this problem using the binomial probability distribution.

Binomial probability distribution:

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem

There are 5 adults, so $n = 5$

60% believe in reincarnation, so $p = 0.6$

What is the probability that exactly 4 of the selected adults believe in reincarnation?

This is P(X = 4).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{5,4}.(0.6)^{4}.(0.4)^{1} = 0.2592$

There is a 25.92% probability that exactly 4 of the selected adults believe in reincarnation.

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3 years ago