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IgorLugansk [536]
3 years ago
11

Help help help help helph helph epl

Mathematics
1 answer:
Jlenok [28]3 years ago
7 0

A: 7.2

B: 14.1

C: 9.5

D: 3.7

E: 8.1

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Two forces act on an object. The first Force has a magnitude of 400 Newtons and acts at an angle of 30 degrees as measured from
Sedaia [141]

ANSWER

Option D is correct

EXPLANATION

We resolve the forces into component forms.

F_1 = 400 \cos(30) i + 400 \sin(30) j

F_1 = 200  \sqrt{3} i +200j

Also the second is resolved to obtain,

F_2= 280 \cos(135) i + 280 \sin(135) j.

F_2=  - 140 \sqrt{2} i + 140  \sqrt{2}  j

To find the resultant vector, V, We add the corresponding components of the two forces to get:

V=F_1+F_2

\implies \: V = (200  \sqrt{3} - 140 \sqrt{2} )i + (200 + 140 \sqrt{2})j

The correct answer is D.

3 0
4 years ago
Add polynomials<br> Simplify:<br> (-5a^3 - 2a^2) + (6a^3+9a^2+8a)
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Combine like terms: Then solve

(-5a3 + 6a3) + (-2a2 +9a2) + 8a =


8 0
3 years ago
Read 2 more answers
Write y+7 = 2/3 (4x-6) in standard form using integers
Marrrta [24]

9514 1404 393

Answer:

  8x -3y = 33

Step-by-step explanation:

Multiply by 3 to eliminate the fraction. Then rearrange to standard form.

  y +7 = 2/3(4x -6) . . . . . . . given

  3(y +7) = 2(4x -6) . . . . . . . multiply by 3

  3y +21 = 8x -12 . . . . . . . . eliminate parentheses

  33 = 8x -3y . . . . . . . . . . add 12-3y to both sides

  8x -3y = 33 . . . . . . . . . swap sides to put into standard form

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Standard form has mutually prime integer coefficients, the leading one being positive.

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2 years ago
The time t required to drive a certain distance varies inversely with the speed r. If it takes 12 hours to drive the distance at
aleksklad [387]

Answer:

8.47 Hours

Step-by-step explanation:

The total distance covered in 12 hours with a speed of 60 mph

Distance = 12 x 60 = 720 miles

Now we are required to find the time taken if the same distance is travelled with a speed of 85 mph

Time = 8.47 hours

4 0
3 years ago
Let’s say Reena and Greg each work for 20 minutes making envelopes. Who will have more envelopes to sell in the flea market? Wha
Veronika [31]

Answer:

The slope of f(x) is greater than g(x). In fact, it is double the slope of g(x). This means Reena can make envelopes two times as fast as Greg. But the y-intercept of g(x) is greater than f(x), meaning at 0 minutes, Greg starts with more envelopes than Reena. If they work for 20 minutes, Greg will have 10 more envelopes than Reena. But if they work longer than 30 minutes, Reena will have a larger stock of envelopes than Greg.

Step-by-step explanation:

answer from Plato

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3 years ago
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