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2 years ago

May anyone help me on this Write your answer using simplest form in all problem

Mathematics

2 answers:

Over [174]2 years ago

6 0

I will give you the answers, and you can comment any questions you have!

5.) 7/8

6.) 1 5/12

8.) 1 1/6

9.) 1 3/8

11.) 7/10

12.)1 1/8

Comment for questions!

Hope this helped!

Dafna11 [192]2 years ago

3 0

8.) is 1 1/4
9.) is 1 3/8

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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

Joanne works two jobs to pay for college. She tutors for $25 per hour and also works as a receptionist for $12 per hour. Due to

il63 [147K]

Answer: C. $t+r\leq 25$

$25t+12r\geq 200$

Step-by-step explanation:

If 't' represents the number of hours Joanne tutors and 'r' represents the number of hours she works as a receptionist.

Then the total hours she can work=t+r

Since she can work up to 25 hours.

Thus $t+r\leq 25$

If she earns $25 per hour by tuition and $ 12 per hour by working as a receptionist .

Then her total earning =$ $25t+12r$

Since she must earn $200.

Then $25t+12r\geq 200$ .

Therefore, the required system of inequality will be

$t+r\leq 25$

$25t+12r\geq 200$

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3 years ago

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PLEASE ANSWER I WILL MAKE U BRAINLIEST

devlian [24]

Answer:

Tara is incorrect.

Step-by-step explanation:

The location of X' will be (7,1)

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3 years ago

Express the first quantity as a percentage of second quantity $45, $120.

Pachacha [2.7K]

Answer: 37.5%

Step-by-step explanation:

Percentage = Given Quantity/Total Quantity*100

So here, it will be like: 45/120*100

=0.375*100

=37.5%

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2 years ago

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Answer:

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3 years ago