2 years ago

What is the contrapositive of the statement if 4x = 12,then x= 3

1 answer:

6 0

You reverse the conclusion and the hypothesis.

Hypothesis= If

Conclusion= then

And then, you flip what it is saying to be the opposite.

Converse:

If x=3, then 4x= 12.

Contrapositive:

If x isn't 3, then 4x does not equal 12.

I hope this helps!

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Find the value of 2cosx+1=0;0 less than x less than 360°

ohaa [14]

Answer:

120°; 240°

Step-by-step explanation:

Let's first solve for $cosx$ : $2cosx=-1 \rightarrow cosx=-\frac12$ At this point it's just a matter of drawing a circle, and mark where the angle is(please excuse my paint skills, but free hand drawing would be even worse). Red line, is $-\frac12$ on the cosines, and both the green and blue lines are valid solutions. The green line is a quarter of a circle, plus 30°, or 120°. The blue one is 3/4 of a circle, minus 30 degrees, or 240°.