3 years ago

Lucia finds that (3x^2+3x+5)

Mathematics

2 answers:

wlad13 [49]3 years ago

7 0

The answer would be x=1

Aneli [31]3 years ago

5 0

Answer:

x=1

Step-by-step explanation:

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If the third term in an arithmetic sequence is 7 and the common difference is -5, what is the value of the fourth term?

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Answer: 2

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

Multiply by 1,2,3 and so on to find the first six multiples of the number 6 the multiples are

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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°.