2 years ago

Can someone help please!!

Mathematics

1 answer:

Nadusha1986 [10]2 years ago

4 0

Can you please explain the subject?

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A jet travels 510 miles in 5 hours. At this rate, how far could the jet fly in 15 hours? What is the rate of speed of the jet?

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Answer:

1530

Step-by-step explanation:

We already know that 5 hours is 510 miles and to know how much is 15 hours you will add 510 3 times 510 + 510 + 510 what 1530 would give

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If the length and width of rectangle A are each k times the length and width of rectangle B, which statement is true?

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Answer:

Step-by-step explanation:

the area of triangle A is k times the area of triangle b

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2 years ago

Two drivers, Alison and Kevin, are participating in a drag race. Beginning from a standing start, they each proceed with a const

Vilka [71]

Answer:

Alison wins against Kevin by 0.93 s

Step-by-step explanation:

Alison covers the last 1/4 of the distance in 3 seconds, at a constant acceleration $a_a$ , we have the following equation of motion

$s/4 = a_at_a^2/2$

where s (m) is the total distance, ta = 3 s is the time

$s = 4a_a3^2/2 = 18a_a$

$a_a = s/18$

Similarly, Kevin overs the last 1/3 of the distance in 4 seconds, at a constant acceleration $a_k$ , we have the following equation of motion:

$s/3 = a_kt_k^2/2$

tk = 4 s is the time

$s = 3a_k4^2/2 = 24a_k$

$a_k = s/24$

Since $a_a = s/18$ we can conclude that $a_a > a_k$ , so Alison would win.

The time it takes for Alison to cover the entire track

$s = a_aT_a^2/2$

$T_a^2 = 2s/a_a = 2s/(s/18) = 36$

$T_a = \sqrt{36} = 6 s$

The time it takes for Kevin to cover the entire track

$s = a_kT_k^2/2$

$T_k^2 = 2s/a_k = 2s/(s/24) = 48$

$T_a = \sqrt{48} = 6.93 s$

So Alison wins against Kevin by 6.93 - 6 = 0.93 s

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2 years ago

A cotton candy vendor has 9 cones of blue cotton candy to sell. If the blue cotton candy is 25% of the total number of cones, ho

pychu [463]

9 = 25%
25% * 4 = 100%
9 * 4 = 36
There are 36 cotton candy cones in total.

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3.16 x 10x10x10 please tell me the answer please

kkurt [141]

Your answer would be 3160.

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