3 years ago

Evaluate 5 +(-4) + (-7) + 2

Mathematics

2 answers:

Charra [1.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

+ - = -

+ + = +

5-4-7+2

-7+2

-5 ans

Goryan [66]3 years ago

3 0

Answer: -4

Step-by-step explanation:

5+(-4) + (-7) + 2

first order of operation PEMDAS

5+(-4) = 1

(-7)+2= -5

add them 1 + (-5) = -4

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A council of three people is to be chosen from a group of 4 lawyers, one artist, and 3 teachers

padilas [110]

Answer: 0.2857

<u>Step-by-step explanation:</u>

At least one teacher means exactly 1 or exactly 2 or exactly 3 teachers. Find the probability of each and add them up.

$\text{One teacher}:\dfrac{3\ teachers}{8\ total\ people}\times\dfrac{5\ others}{7\ people}\times \dfrac{4\ others}{6\ people}=\dfrac{5}{28}=0.1786\\\\\\\text{Two teachers}:\dfrac{3\ teachers}{8\ total\ people}\times\dfrac{2\ teachers}{7\ people}\times\dfrac{5\ others}{6\ people}=\dfrac{5}{56}=0.0893\\\\\\\text{Three teachers}:\dfrac{3\ teachers}{8\ total\ people}\times\dfrac{2\ teachers}{7\ people}\times\dfrac{1\ teacher}{6\ people}=\dfrac{1}{56}=0.0179$