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3 years ago

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How did brianly choose the best answer

1 answer:

ladessa [460]3 years ago

5 0

Answer:

➢ Unfortunately, Brainly appears more to be a place to get quick answers so that students can finish homework faster. The answers, even if they're correct, often offer little to no elaboration or depth on the topic, and there's no guarantee that given answers will be correct.

$#CarryOnLearning$

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The data set represents the number of rings each person in a room is wearing. 0, 2, 4, 0, 2, 3, 2, 8, 6 What is the interquartil

taurus [48]

D1,..,d9 = 0,0,2,2,2,3,4,6,8 //there are 9 values, in ascending order
Q2 (median) = d5 = 2 //value in the middle
Q1 = (d2+d3) / 2 = (0+2)/2 = 1
(Q1 is middle value of d1,d2,d3,d4, but there is no middle element among four elements, that is why arithmetic mean is taken)
Q3 = (d7+d8) / 2 = (4+6)/2 = 5
interquantlie range = IQR = Q3 - Q1 = 5 -1 = 4
answer: 4

4 0

3 years ago

Read 2 more answers

For the first 30 km, the bicyclist rode with a speed of v km/hour. For the remaining 17 km he rode with a speed which was 2 km/h

damaskus [11]

Answer:

t= 2.52 hours

Step-by-step explanation:

It is given that for first 30 km, the speed of bicyclist is v km/hour

time taken to cover first 30 km is given by

$t_{1} =\frac{30}{v}$ ( $time=\frac{distance}{speed}$ )

for next 17 km the speed of bicyclist is 2 km/hour greater than his original speed

so the speed to cover next 17 km = v+2

time taken to cover next 17 km is given by

$t_{2} =\frac{17}{v+2}$

now total time t spent by the bicyclist to cover entire trip is given by

$t=t_{1} +t_{2}$

$t=\frac{30}{v} +\frac{17}{v+2}$

now if v=18 , we have

$t=\frac{30}{18} +\frac{17}{20}$

now to add fractions we make the denominator same

Hence we will find the LCM of 18 and 20

LCM of 18 and 20 = 180

now we need to make both the denominator equal to 180

$t=\frac{30(10)}{18(10)} +\frac{17(9)}{20(9)}$ $t=\frac{300}{180} +\frac{153}{180} =\frac{300+153}{180}$

$t=\frac{453}{180} =2.52$ hours (approx)

7 0

3 years ago

Carmen represents the equation y=x^2+1 using a graph. She says her graph shows there is more than one input for almost every out

Korvikt [17]

No - It is a function.

A relation which is not a function has more than 1 output for an input.

7 0

3 years ago

Whats the value of x

Vlad [161]

Answer:

write quizzes rock cheat and press the first result you get then write the code for the game and it will show all the answers for all the question

8 0

3 years ago

Read 2 more answers

Construct the graph of the equation y=kx if it is known that the point B belongs to the graph. The graph of which of these two e

PIT_PIT [208]

Answer:

The graph with B(2,-3) i.e) y= $\frac{-3}{2}$ x goes through the point M(-10,15).

Step-by-step explanation:

Consider M(-10,15) and given that equation is y = kx.

Now, substitute M(-10,15) in the equation

⇒ 15 = k × -10

⇒ k = $\frac{15}{-10}$ = $\frac{-3}{2}$

⇒ y = $\frac{-3}{2}$ x

Now, check with the given points B(2,-3) and B( $3\frac{1}{3}$ , -2)

1) B(2,-3)

y = $\frac{-3}{2}$ x

⇒(-3) = $\frac{-3}{2}$ × 2

⇒ -3 = -3 ⇒ LHS = RHS

⇒ B(2,-3) is the required point.

2) for b( $3\frac{1}{3}$ , -2)

LHS ≠ RHS.

So,The graph with B(2,-3) i.e) y= $\frac{-3}{2}$ x goes through the point M(-10,15).

8 0

3 years ago