Sandra plays a matching game. In order to advance to the next level, she must score at least 10 points. She scores 18 points for correct matches and –6 points for incorrect matches.
Did Sandra make it to the next level? Use the drop-down menus to explain your answer.
Sandra
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make it to the next level because she scored a total of
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points, which is
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10.

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

9x