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Helen [10]
3 years ago
8

1/2x+1/3y=7,1/4x+2/3y=6

Mathematics
2 answers:
Elena-2011 [213]3 years ago
5 0

A is the answer (1/16,14)


mel-nik [20]3 years ago
5 0
We can see that 1/3 times 2=2/3
we can cancel the y terms

multily first equation by -2 and add to 2nd

-x-2/3y=-14
<u>1/4x+2/3y=6 +</u>
-3/4x+0y=-8

-3/4x=-8
times both sides by -4
3x=32
divide both sides by 3
x=32/3

sub back

1/2x+1/3y=7
1/2(32/3)+1/3y=7
16/3+1/3y=7
times 3 both sides
16+y=21
minus 16 both sides
y=5


(32/3,5)
(10 and 2/3,50

C is answer
an easier way would be to get rid of the fractions by multiplying the first equation by 6 and 2nd one by 12 but oh well

C is the answer
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6 Paul runs 1.5 km on the bearing 127°. a Draw a diagram of the situation. b How far east is Paul from his starting point? ( How
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By running in a bearing of 127°, Paul motion is in the south eastern direction.

Correct responses:

a. Please find attached the required diagram created with MS Visio

b. Paul's distance travelled east is approximately 11.98 km

  • Paul's distance travelled south is approximately 0.903 km

<h3>Method used for diagram and for the distance calculation</h3>

Given:

The distance Paul runs = 1.5 km

The bearing Paul is running = 127°

a. The bearing of path Paul runs, 127°, is the angle measured in the clockwise direction relative to the northern direction

Please find attached the diagram representing the situation, created with MS Visio.

b. Paul's distance travelled east relative to the starting point is given by the component of Paul's path in the x-axis direction which is found as follows;

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Pau's distance travelled in the south direction relative to the starting point

is given by the vertical distance travelled relative to the x-axis, which is

given as follows;

Distance Paul travels south = 1.5 km × sin(37°) ≈ <u>0.903 km</u>

Learn more about bearings in trigonometry here:

brainly.com/question/23427938

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2 years ago
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I've answered this before, but only partially. I'm not sure about the second part, but I think the first one is 10

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