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3 years ago

Find the mean of their scores

Mathematics

2 answers:

Minchanka [31]3 years ago

7 0

Answer:

7.5!

Step-by-step explanation:

they all add up to 60. divide 60 by 8 and you get 7.5

Lemur [1.5K]3 years ago

5 0

Answer:

7.857 rounded to the nearest 10th is 7.9

Step-by-step explanation:

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A train leaves Los Angeles at 2 p.m. heading north at 50 mph. If the next train leaves three hours later and also heads north at

Mamont248 [21]

Since the first train has been travelling for 3 hours, we have the following equations:
$d=50t+3*50=50t+150$
$d=60t$

We want to know when they will be equal, so set these equal to eachother:
$60t=50t+150$
$10t=150$
$t=15$

So 15 hours after the second train leaves, they will be at the same distance. This is at 8AM since the second train leaves at 5PM.

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3 years ago

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Derek is solving the following equation. Find where he made a mistake.

Arisa [49]

Answer:

he was supposed to add three on both sides

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3 years ago

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-t/4=-3pi what does t equal

worty [1.4K]

Answer:

$t=12\pi$

Step-by-step explanation:

$\dfrac{-t}{4}=-3\pi\\t=12\pi$

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3 years ago

3)There are 9 colorful socks in a drawer: 3 green, 2

Lelu [443]

Answer:

1/24 chance

Step-by-step explanation:

To begin you would need to find the probability of picking a green sock which would be 3/9; and you could simplify this to 1/3.

After that you need to find the probability of picking a purple sock out of the 8 left, which would provide you with 1/8. To find the probability of both you would multiply 1/8 by 1/3 to find the combined probability which would leave you with 1/24.

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3 years ago

Triangle OPQ is similar to triangle PST. Need this asap

mars1129 [50]

Answer:

58.2

Step-by-step explanation:

We can find the length of RS using similarity ratio

7/34 = 12/RS cross multiply expressions

7RS = 408 divide both sides by 7

RS = 58.2 approximately.

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2 years ago