Which of these expressions is equal to 0?
a. -24/6 - 4

b. -24/-6 + 4

c. 24/6 + 4

d. -24/-6 - 4

B is the answer

Step-by-step explanation:

Why? It is equal to 0

d. -24/-6 - 4

Step-by-step explanation:

Use order of operation (PEMDAS) to solve.

There are no parentheses.

There are no exponents.

There is multiplication and/or division. Do this first, from left to right.

There is addition and/or subtraction. Do this second, from left to right.

Solve. Remember that a negative times (or divided by) a negative makes a positive.

-24 / -6 = 4

4 - 4 = 0

Check your work. None of the other expressions are equal to 0.

a. -24 / 6 - 4 = -4 - 4 = -8

b. -24 / -6 + 4 = 4 + 4 = 8

c. 24/6 + 4 = 4 + 4 = 8

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

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