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3 years ago

Sara completes 2/5 of her math homewIrk in class. What percentage is left for Sara to finish

Mathematics

1 answer:

Bad White [126]3 years ago

3 0

Step-by-step explanation:

Well 3/5 is left.

20 × 5 = 100

She did 40% because 2/5 = 4/10

So if 20 × 3 = 60 the there is 60% left

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At 5.45p.M .,lixin,khairul and Devil are at the starting point of a 1-km circular path. Lixin Takes 18 minutes to walk one round

sweet [91]

Answer:

$Meeting\ Time = 6:03\ pm$

Step-by-step explanation:

Given

$Start\ Time= 5:45pm$

$Lixin = 18\ min/round$

$Khairul = 360\ seconds/round$

$Devi = 4minutes/2\ rounds$

Required

Determine their next meeting time

First, we need to get their unit rate in minutes per round

$Lixin = 18\ min/round$

$Khairul = 360\ seconds/round$

Convert 360 seconds to minutes

$Khairul = \frac{360}{60} min/round$

$Khairul = 6 min/round$

$Devi = 4minutes/2\ rounds$

Divide by 2/2

$Devi = 2mins/round$

So, we have:

$Lixin = 18\ min/round$

$Khairul = 6 min/round$

$Devi = 2mins/round$

Next, is to determine the LCM of 18, 6 and 2

$18=2 * 3 * 3$

$6 = 2 * 3$

$3 = 3$

Their LCM is:

$LCM = 2 * 3 * 3$

$LCM = 18$

This means that they will meet 18 minutes after their initial time of departure.

So:

$Meeting\ Time = 5:45\ pm + 18\ minutes$

$Meeting\ Time = 6:03\ pm$

3 0

3 years ago

Find the value of 5(a-4b) when a =-7 and b=1/4

tatiyna

Answer:

- 40

Step-by-step explanation:

$5(a - 4b) \\ = 5 \bigg(- 7 - 4 \times \frac{1}{4} \bigg ) \\ = 5 \bigg(- 7 - 1 \bigg ) \\ = 5 \times ( - 8) \\ = - 40$

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GREYUIT [131]

Answer:

First choice

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Step-by-step explanation:

In this function,we need to use graph in order to find out the range.

Graph is attached.

$\boxed{ - \infty < y < \infty }$

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2 years ago

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Ratling [72]

Answer:

Corresponding angles are equal. They're a F shape and it could be upside down.

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adelina 88 [10]

quadrant IV

Sure hope this helped you, have a good day! =)

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