A student evaluated −4 + (−9 12) and got an answer of 5 1/2. What might the student have done wrong?

Mathematics

1 answer:

777dan777 [17]3 years ago

3 0

Answer:

The student added +4 instead of -4 so instead of getting -13 1/2 they got 5 1/2 somehow since even if they did that it should be -5 1/2.

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Hmmmm-Another one please?

Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

Find the number that 9 multiplies by to get 54

9x6=54

do the same to four

4x6=24

cross multiply

Lets put N as the missing number

4x54=9xN

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Convert the angle 57°29'38" to decimal degrees and round to the nearest hundredth of a degree.

Daniel [21]

The answer is 57.49°

57°29'38" = 57° + 29' + 38"

1° = 60'
x° = 29'
1 : 60 = x : 29
x = 29 * 1 : 60 = 0.48°
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x° = 38''
1 : 3600 = x : 38
x = 38 * 1 : 3600
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Answer:

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S) step-by-step explanation:

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