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3 years ago

David leaves the supermarket at 1810

Mathematics

1 answer:

Lapatulllka [165]3 years ago

4 0

Answer:

The total distance David has to travel 20 miles.

The speed limit is 30 mph. He leaves supermarket at 18 10 , he has 50 minutes to get home before 1900.

when traveling within the speed limit he can reach on time because he has to travel only 20 miles which is possible and it won't take him 1 hour according to the 30 mph speed limit.

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Check that 2b+b and 3b have the same value when b is 1,2, and 3. Do 2b+b and 3b have the same value for all values of b? Explain

Inessa [10]

Answer:

Expression 2b+b and 3b have same values for all values of b.

Step-by-step explanation:

Given the two expression $2b+b$ and $3b$ and values of b as 1, 2 and 3.

Consider first expression that is, $2b+b$ .

Substituting the value of $b=1$ ,

$2\left(1\right)+\left(1\right)=2+1=3$ ....1

Substituting the value of $b=2$ ,

$2\left(2\right)+\left(2\right)=4+2=6$ ....2

Substituting the value of $b=3$ ,

$2\left(3\right)+\left(3\right)=6+3=9$ ....3

Consider second expression that is, $3b$ .

Substituting the value of $b=1$ ,

$3\left(1\right)=3$ ....4

Substituting the value of $b=2$ ,

$3\left(2\right)=6$ ....5

Substituting the value of $b=3$ ,

$3\left(3\right)=9$ ....6

For value of b=1, equation 1 and equation 4 are same, for value of b=2, equation 2 and equation 5 are same and for value of b=3 equation 3 and equation 6 are same.

Therefore both expression are same for all values of b.

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3 years ago

student measuring how gasoline prices change records the cost of gas at 10 randomly selected stations in her hometown. One week

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Answer:

We conclude that he used a paired two-sample t-test.

Step-by-step explanation:

We know that the student measuring how gasoline prices change records the cost of gas at 10 randomly selected stations in her hometown. One week later, she records the price again at the same 10 stations.

We conclude that he used a paired two-sample t-test.

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gizmo_the_mogwai [7]

Answer:

Step-by-step explanation:

He has to walk down 3 blocks and right 10

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2 years ago

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Help me please! It’s due in like 10 minutes and I’m barely on the 8th question !!!