3 years ago

Which of the following systems of linear equations has no solution?

Mathematics

2 answers:

madreJ [45]3 years ago

5 0

None of them above the last one

marusya05 [52]3 years ago

5 0

Answer:

D. none of the above

Step-by-step explanation:

They all have at least one solution.

I hope this helps :)

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Solve. x __ 2 = 7 ---------------------------------------- PLEASE HELP!

galina1969 [7]

$\frac{x}{2} = 7\\\\\frac{x}{2} \times 2 = 7\times2\\\\\boxed{x=14}$

5 0

3 years ago

In 1980, the average cost of a pack of cigarettes was $0.88. In 2000, the average cost was $5.31 per pack.

yan [13]

Answer:

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average rate of change is slope.

Step-by-step explanation:

The average rate of change of the cost of a pack ( $r$ ), in monetary units per year, is equal to the change in the average cost of a pack ( $\Delta c$ ), in monetary units, divided by the change in time ( $\Delta t$ ), in years. Then, the average rate of change is: