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3 years ago

9

If your are flying in a plane going 500km/h, how far (in km) will you go in 2 hours and 15 minutes

2 answers:

lozanna [386]3 years ago

7 0

Answer:

1,125

Step-by-step explanation:

500 x 2 1/4 is 1,125

weqwewe [10]3 years ago

5 0

Answer: 1125 km.

Step-by-step explanation: In 2 hours, you will travel 1,000 km. 15 is 1/4 of 60, so multiply 1/4 and 500 and add that product to 1,000. Therefore, the answer is 1125 km.

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Write an equation that defines the function :)

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Answer:

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Step-by-step explanation:

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Two vectors A⃗ and B⃗ are at right angles to each other. The magnitude of A⃗ is 5.00. What should be the length of B⃗ so that th

creativ13 [48]

Answer:

Length of B is 7.4833

Step-by-step explanation:

The vector sum of A and B vectors in 2D is

$C=A+B=(a_1+b_1,a_2+b_2)$

And its magnitude is:

$C=\sqrt{(a_1+b_1)^2+(a_2+b_2)^2} =9$

Where

$a_1=Asinx$

$a_2=Acosx$

$b_1=Bsin(x+90)$

$b_2=Bcos(x+90)$

Using the properties of the sum of two angles in the sin and cosine:

$b_1=Bsin(x+90)=B(sinx*cos90+sin90*cosx)=Bcosx$

$b_2=Bcos(x+90)=B(cosx*cos90-sinx*sin90)=-Bsinx$

Sustituying in the magnitud of the sum

$C=\sqrt{(Asinx+Bcosx)^2+(Acosx-Bsinx)^2} =9$

$C=\sqrt{A^2sin^2x+2ABsinxcosx+B^2cos^2x+A^2cos^2x-2ABsinxcosx+B^2sin^2x} =9$

$C=\sqrt{A^2(sin^2x+cos^2x)+B^2(cos^2x+sin^2x)}$

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8 0

3 years ago

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Helga [31]

Answer:

42 is answer

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3 0

3 years ago

Read 2 more answers

Ayso has 18 8th grade boys teams this year but this is a 28% decrease from the prior year. How many 8th grade teams were there l

NikAS [45]

Answer:

23pupils

Step-by-step explanation:

Given parameters:

Number of 18th grade boys this year = 18

Percentage decrease = 28%

Unknown:

How many 8th grade teams were there last year = ?

Solution:

Since this is a percentage decrease, ;

Number of pupils this year = Number of pupils last year - (28% x 18 )

18 + (28% x 18 ) = Number of pupils last year

Number of pupils last year = 23pupils

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3 years ago