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damaskus [11]
2 years ago
9

The table shows the change in the water level (in centimeters) of a reservoir for three months. Find the total change in the wat

er level for the three-month period. Write your answer as a fraction or mixed number in simplest form.

Mathematics
1 answer:
RideAnS [48]2 years ago
5 0

Answer:

-\frac{65}{28} or -2\frac{9}{28}

Step-by-step explanation:

Add all fractions:

-1\frac{3}{4} + -\frac{1}{28} + -\frac{15}{28} = -\frac{65}{28}

Simplify if needed:

-\frac{65}{28} = -2\frac{9}{28}

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3 years ago
Suppose that there are 15 antennas in a store, of which 3 are defective. Assume all the defectives and all the functional antenn
ohaa [14]

Answer:

Step-by-step explanation:

Total number of antenna is 15

Defective antenna is 3

The functional antenna is 15-3=12.

Now, if no two defectives are to be consecutive, then the spaces between the functional antennas must each contain at most one defective antenna.

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We line up the 13 good ones, and see where the bad one will fits in

__G __ G __ G __ G __ G __G __ G __ G __ G __ G __ G __ G __G __

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14C3=14×13×12/6

14C3=364ways

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