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3 years ago

Help !!!! I will mark as brainliest 20 points !!!! solve both of question !!!

Mathematics

2 answers:

Savatey [412]3 years ago

5 0

Answer:

solution is on the picture attached

Hope this helps

Lapatulllka [165]3 years ago

4 0

Answer:

a). k ≥ -1

b). k < 5

c). k ≤ 2

d). k > -3

Step-by-step explanation:

a). k ≥ - 3 + 2

k ≥ -1

b). 3k < 16 - 1

3k < 15

k < 5

c). -4k ≥ -5 - 3

4k ≤ 8

k ≤ 2

d). 3k > -10 + 1

3k > -9

k > -3

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Find the 11th term of the following geometric sequence. 1, 3, 9, 27, ...

Natasha_Volkova [10]

Answer:

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Step-by-step explanation:

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3 years ago

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A train from Portland, Oregon, to Los Angeles, California, travels at an average speed of 60 miles per hour and covers a distanc

seropon [69]

Answer:

The train need to leave Portland at 03:27 am

Step-by-step explanation:

step 1

Find out how long it takes the train to travel from Portland, Oregon, to Los Angeles, California

Remember that

The speed is equal to divide the distance by the time

The time is equal to divide the distance by the speed

Let

s ---> the speed in miles per hour

d ---> the distance in miles

t ---> the time in hours

$t=\frac{d}{s}$

we have

$d=963\ mi$

$s=60\ mi/h$

substitute

$t=\frac{963}{60}=16.05\ hours$

step 2

Adds 30 minutes (time it takes to get from the train station to her aunt's house)

Remember that

$30\ minutes=0.50\ hours$

$16.05+0.50=16.55\ hours$

Convert to minutes

$16.55\ h=16.55(60)\ min=993\ min$

step 3

Remember that

$8 p.m=20:00\ hrs$

Convert to minutes

$20(60)=1,200\ min$

Subtract 993 minutes from 1,200 minutes

$1,200-993=207\ min$

Convert to hours+minutes

$207\ min=207/60=3.45\ hours$

$0.45\ h=0.45(60)=27\ min$

$3\ h+27\ min$

$00:00 + 03:27=03:27\ am$

therefore

The train need to leave Portland at 03:27 am

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3 years ago

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Answer:

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3 years ago

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