Two forces of 545 n and 218 n act at a point. the resultant force is 619 n. find the angle between the forces

90.93 degrees

Step-by-step explanation:

Let us consider the angle between two forces .

As per the parallelogram rule we know that the sum vector is along the diagonal of the parallelogram, splitting the parallelogram into two triangle with sides of lengths 545 N, 218 N, and 619 N. The angle opposite to the side of length 619 is (π - θ) radians. Now apply the law of cosines to finish.

Therefore, the angle between two forces is 90.93 degrees.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

i can't solve unless i know what the line is

step-by-step explanation:

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