The solution to 4.2x = 19.32 is x = ___. 0.28 0.45 4.6 15.12
2 answers:
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ANSWER
EXPLANATION
We want to solve the trigonometric equation
We group like terms to obtain,
Divide both sides of the equation by 3 to get,
We can reciprocate both sides to get,
We simplify the right hand side to get,
Since the tangent ratio is negative, it implies that it is either in the second quadrant or fourth quadrant.
In the second quadrant,
In the fourth quadrant,
EXPLANATION
We want to solve the trigonometric equation
We group like terms to obtain,
Divide both sides of the equation by 3 to get,
We can reciprocate both sides to get,
We simplify the right hand side to get,
Since the tangent ratio is negative, it implies that it is either in the second quadrant or fourth quadrant.
In the second quadrant,
In the fourth quadrant,
Answer:
x= -9/7
y= -38/7
so it has A. exactly one solution
Step-by-step explanation:
Substitute into one of the equations: 5x+1= -2x-8
Rearrange unknown terms to the left side of the equation: 5x+2x=-8-1
Combine like terms:7x=-8-1
Calculate the sum or difference: 8x=-9
Divide both sides of the equation by the coefficient of variable: x=-9/7
Substitute into one of the equations:y=-2×(-9/7)-8
Write as a single fraction:y=2×9/7-8
Calculate the product or quotient:y=18/7 -8
Convert the expression into a fraction: y=18/7 -8/1
Expand the fraction to get the least common demominator:y=18/7-8x7/1x7
Calculate the product or quotient: y=18/7-56/7
Write the numerators over common denominator:y=18-56/7
Calculate the sum or difference: y=-38/7
Rewrite the fraction: y= -38/7
The solution of the system is:
x= -9/7
y= -38/7
