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4 years ago

Find the solution to the equation below. 2x^2+3x-20=0

Mathematics

2 answers:

icang [17]4 years ago

8 0

C maybe bro I’m not really sure tho think I’m messing up

Sphinxa [80]4 years ago

4 0

<h2>Answer:</h2>

<u>The right choice is </u><u>(D) x= -4, 5/2</u>

<h2>Step-by-step explanation:</h2>

2x^2+3x-20=0

By factoring the expression we get

2x²2 +8x−5x−20=0

(x+4) (2x−5) = 0

Now

(x+4) = 0 OR x = -4

and

(2x-5) = 0 OR x = 5/2

S the solutions are

x= -4 and x = 5/2

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Jacob confused the values, the first coordinate of the ordered pairs (which corresponds to the x-axis) is in Celsius and he used it as Farenheit.

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3 years ago

Jayden has been reading a 275275275-page book for English class. On average, he has read about 101010 pages in 151515 minutes (\

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First let's define variables:
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3 years ago

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Answer:

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width (w) = 14 in.

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3 years ago

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Read 2 more answers

Name the sampling method used in each of the following situations:

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Answer:

a) Convenient

b) Cluster

c) Stratified

d) Systematic

e) Random

Step-by-step explanation:

Samples may be classified as:

Convenient: Sample drawn from a conveniently available pool.

Random: Basically, put all the options into a hat and drawn some of them.

Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.

Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.

Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

Situation a:

Asks all from a single group(sitting passengers), that is, convenint sample.

Situation b:

First she separates the students by row, then from each row, she chooses all students. So this is Cluster sampling.

Situation c:

The manager separates the stores by location, and then in each location, random customers are chosen. This is an example of Stratified sampling.

Situation d:

Marks for every fourth patron, that is, every 4th element. So Systematic sampling.

Situation e:

People chosen at random, so Random sampling.

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3 years ago