3 years ago

Which expression is equivalent to -4 square root of 12

Mathematics

1 answer:

Zepler [3.9K]3 years ago

3 0

Answer:

Is is supposed to be multiple choice?

Step-by-step explanation:

The answer is b. Hope this helped! :)

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If there are 10 people in a race how many ways can 1st 2nd 3rd places be awarded

kiruha [24]

3 slots
1st slot has 10 possible people
2nd slot has 9 possible people (1 less than previous)
3rd slot has 8 possible people

so there are 10*9*8 ways or 720 ways

4 0

4 years ago

Solve the quadratic equation:

Umnica [9.8K]

Answer:

Step-by-step explanation:

$x^2+7x+10=0\qquad\implies\quad a=1\,,\ b=7\,,\ c=10\\\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}=\dfrac{-7\pm\sqrt{7^2-4(1)(10)}}{2(1)}=\dfrac{-7\pm\sqrt{49-40}}{2}=\dfrac{-7\pm\sqrt9}{2}\\\\ x_1=\dfrac{-7+3}2=\dfrac{-4}2=-2\,,\qquad x_1=\dfrac{-7-3}2=\dfrac{-10}2=-5$