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3 years ago

I am not very smart please help me i love you

Mathematics

2 answers:

DaniilM [7]3 years ago

6 0

Answer:

3 is is the correct answer to this

vodomira [7]3 years ago

5 0

I believe it would be 4

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An airliner maintaining a constant elevation of 2 miles passes over an airport at noon traveling 500 mi/hr due west. At 1:00 PM,

butalik [34]

Answer:

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

Step-by-step explanation:

Let suppose that airliners travel at constant speed. The equations for travelled distance of each airplane with respect to origin are respectively:

First airplane

$r_{A} = 500\,\frac{mi}{h}\cdot t\\r_{B} = 550\,\frac{mi}{h}\cdot t$

Where t is the time measured in hours.

Since north and west are perpendicular to each other, the staight distance between airliners can modelled by means of the Pythagorean Theorem:

$s=\sqrt{r_{A}^{2}+r_{B}^{2}}$

Rate of change of such distance can be found by the deriving the expression in terms of time:

$\frac{ds}{dt}=\frac{r_{A}\cdot \frac{dr_{A}}{dt}+r_{B}\cdot \frac{dr_{B}}{dt}}{\sqrt{r_{A}^{2}+r_{B}^{2}} }$

Where $\frac{dr_{A}}{dt} = 500\,\frac{mi}{h}$ and $\frac{dr_{B}}{dt} = 550\,\frac{mi}{h}$ , respectively. Distances of each airliner at 2:30 PM are:

$r_{A}= (500\,\frac{mi}{h})\cdot (1.5\,h)\\r_{A} = 750\,mi$

$r_{B}=(550\,\frac{mi}{h} )\cdot (1.5\,h)\\r_{B} = 825\,mi$

The rate of change is:

$\frac{ds}{dt}=\frac{(750\,mi)\cdot (500\,\frac{mi}{h} )+(825\,mi)\cdot(550\,\frac{mi}{h})}{\sqrt{(750\,mi)^{2}+(825\,mi)^{2}} }$

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

6 0

3 years ago

Drew drives his car and Rachel drives her truck in the same direction on the highway at constant speeds for 3.25 hours. During t

never [62]

Answer:

After 4.5 hours of driving at the same constant speeds, Drew and Rachel are 6.5 miles apart.

Hope This Helps :)

4 0

3 years ago

The sum of two numbers is 4 and their difference is -10. What are the numbers

Anit [1.1K]

Answer:

-3 and 7

Step-by-step explanation:

4 -(-10) = 14

14÷2=7(largest no.)

7-10=-3(smallest no.)

7 0

3 years ago

A Tom bought these 3 t shirts at the sale price of $ 14. 50. How much money did he save compared to the original total of the t

lidiya [134]

Answer:

$2.47

14.6%

Step-by-step explanation:

Total of the original prices:

$3.99 + $6.99 + $5.99 = $16.97

He paid $14.50 for the 3 shirts.

$16.97 - $14.50 = $2.47

He saved $2.47.

The percent he saved is

2.47/16.97 × 100% = 14.6%

5 0

2 years ago

What is 2/3 multiplied by 3equals what

Digiron [165]

Answer:

6/3 as an Improper Fraction.

2 as a whole number.

Step-by-step explanation:

2/3 multiplied by 3 is as shown below.

2/3 + 2/3 + 2/3.

As an Improper Fraction, the sum would be expressed as:

2 + 2 + 2 = 6. 6/3

2/3 • 3 = 2, since 6/3 = 2 as well.

3 0

3 years ago