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2 years ago

PLEASE HELP!!!!!!!

Mathematics

2 answers:

Naily [24]2 years ago

5 0

Answer:

twice the number of 30 second ads = the number of 60 second ads

Step-by-step explanation:

I can not see much work done for explanation of the error, but

let x be the ad pf 30 second

y be the ad of 60 second

so both add together will make 12 minutes, so by counting the time in seconds we will multiply 12 by 60 so we will have a equation

x +y = 12 x 60

x+y = 720 ----------1

as x is 30 second so we can say y = 2x---------- equation 2

adding value of y in equation 1

x+ 2x= 720

3x= 720

x= 720/3= 240

adding value of x in equation 2

y= 2(240)

y= 480

so from equation 1 and 2., x = 240 y =480

hodyreva [135]2 years ago

4 0

Answer:Zöe set up an equation that would translate to “twice the number of 30 second ads = the number of 60 second ads.” She should have used

Step-by-step explanation:

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Step-by-step explanation:

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2 years ago

In ΔXYZ, x = 71 cm, y = 91 cm and z=71 cm. Find the area of ΔXYZ to the nearest square centimeter.

anyanavicka [17]

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2 years ago

Adam must fly home to city A from a business meeting in city B. One flight option flies directly to city A from B, a distance o

g100num [7]

Answer:

The value is $k =109.6 \ miles$

Step-by-step explanation:

The diagram illustrating the question is shown on the first uploaded image

From the question we are told that

The distance from city A to B is AB = 467.3 miles

The bearing from B to C is $\theta_{BC} = N 28.7E$

The bearing from B to A is $\theta_{BA} = N 60.7E$

The bearing from A to B is $\theta_{AB} = S60.7W$

The bearing from A to C is $\theta_{AC} = S79.1W$

Generally from the diagram

$\theta_A = 180 - 60.7 -79.1$

=> $\theta_A = 40.2 ^o$

Also

$\theta_B = 32^o$

and

$\theta_C = 180 - (\theta_A +\theta_B )$

=> $\theta_C = 180 - (40.2 + 32 )$

=> $\theta_C = 107.8 ^o$

Generally according to Sine Rule

$\frac{BC}{sin (\theta_A)} = \frac{CA}{sin (\theta_B)} =\frac{AB}{sin (\theta_C)}$

=> $\frac{BC}{sin (40.2)} = \frac{CA}{sin (32)} =\frac{467.3 }{sin (107.8)}$

$\frac{BC}{sin (40.2)} = \frac{467.3 }{sin (107.8)}$

=> $BC = 316.8 \ miles$

Also

$\frac{CA}{sin (32)} = \frac{467.3 }{sin (107.8)}$

$CA = 260 .1 \ miles$

Generally the additional flyer miles that Adam will receive if he takes the connecting flight rather than the direct flight is mathematically represented as

$k = [CA +BC] - AB$

=> $k = [260 .1 +316.8]- 467.3$

=> $k =109.6 \ miles$

4 0

2 years ago