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vovangra [49]
3 years ago
5

Solve the system of equations by substitution. y = 5x - 13 4x + 3y = 18 The solution is

Mathematics
1 answer:
Rudik [331]3 years ago
3 0

Answer:

x=3 and y=2

Step-by-step explanation:

1.) 4x+3(5x-13)=18

expand into 4x+15x-39=18

18+39= 57

15x+4x= 19x

57/19= 3 so x=3

substitute 3 into y= 5x - 13

and you get 2 so y=2

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What is the decimal equivalent of 6/13 ? Round to tenths place. If answer doesn't
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Answer:

0.5

Step-by-step explanation:

6/13 is the same as saying 6 ÷ 13

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2 years ago
Read 2 more answers
The angle between a 180-pound force F and AB= 5i + 2j is 30.Find the work done by F in moving and object from A to B.
Alexeev081 [22]

Answer:

W=839.464\ ft*lbf

Step-by-step explanation:

The work done is the product of the magnitude of the force applied to the object by the magnitude of the displacement of the object by the cosine of the angle between the force and direction of the displacement. This is:

W=|F|*|r|cos(\theta)

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\theta=30\°

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The magnitude of vector AB is:

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Finally the work is:

W=180*\sqrt{29}*cos(30\°)

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3 years ago
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