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3 years ago

2 people can plough a field in 6 hours.

Mathematics

2 answers:

Tems11 [23]3 years ago

5 0

B is the answer because it’s the one that makes most sense

MrRa [10]3 years ago

5 0

Answer:

LINEAR: 1 person will take 9 hours, 3 people will take 3 hours

y = -3x+12

QUADRATIC: 1 person will take 12 hours, 3 people will take 4 hours

y = (x - 3)^2 + 4

Step-by-step explanation:

LINEAR:

This line has a negative slope, as it would logically take less time if you have more people. If this is linear, the slope is -1 * 6/2 = -3.

-3(2) + b = 6

-6 + b = 6

b = 12

y= -3(1) + 12 = 12 - 3 = 9 hours

QUADRATIC:

If you assume that 2 people take 6 hours, 1 person should take 12 hours.

Run a quadratic regression with diagnostics, and you'll get the equation

y = (x-3)^2+4 with 100% accuracy.

Then you'll find that 1 person took 12 hours, and 3 people took 4 hours

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alina1380 [7]

The answer should actually be option B)

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3 years ago

The quality control officer at a manufacturing plant needs to determine what percentage of items in a batch are defective. The f

artcher [175]

Answer:

A. Simple Random Sampling

B. Cluster Sampling

C. Convenience Sampling

D. Systematic Sampling

E. Stratified Sampling

Step-by-step explanation:

Simple Random Sampling is the sampling when samples are chosen randomly, where each unit has an equal chance of being selected in a sample.

If the population is divided into a different group called cluster and clusters are selected as a sample then it is Cluster Sampling.

In Convenience sampling, observers collect the sample as his\her convenience.

In Systematic Sampling sample is chosen by some criteria like he\she is taken every 10th unit as a sample from the population.

In Stratified Sampling population is divided into several groups such that within the group it is homogeneous and between the group it is heterogeneous. And now a selection of each stratum and unit has an equal chance of selection.

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3 years ago

3/4 of x if x= 15/28<br> PLS HELP!!!!!!!

vfiekz [6]

Answer:

5/7

Step-by-step explanation:

first of mean to divide

so it really saying x ÷ 3/4 and x = 15/28

15/28 ÷ 3/4 but you cant divide fractions

so we use copy dote flip

copy 15/28

dote ×

flip 4/3

15/28 × 4/3

then cross simplafiy so 4 can go into 28, 7 rimes. and 3 can go into 15, 5 times

5/7

6 0

3 years ago

Read 2 more answers

The square root of -12 × the square root of -9 (THIS IS AN ALGEBRA 2 QUESTION)

nlexa [21]

Answer:

$\sqrt{-12} = 2\sqrt{3} i\\\sqrt{-9}= 3i\\3i * 2\sqrt{3}i = -6\sqrt{3$

Step-by-step explanation:

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3 years ago

What's a number that has exactly three factors???

Kay [80]

The factors of 4 are 1, 2, and 4 .

The factors of 9 are 1, 3, and 9 .

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3 years ago