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Charra [1.4K]
2 years ago
9

Marcus and Jeremy both evaluated the expression −52 + 3. Marcus said the answer was −22. Jeremy said the answer was 28. Who is c

orrect? Explain the error in the other student’s work.
Mathematics
1 answer:
emmasim [6.3K]2 years ago
8 0

This question is incomplete because it was not properly written

Complete Question

Marcus and Jeremy both evaluated the expression −(5²) + 3. Marcus said the answer was −22. Jeremy said the answer was 28. Who is correct? Explain the error in the other student’s work.

Answer:

Marcus is right, the answer is -22

Step-by-step explanation:

The expression to simplify is given as

-(5²)+ 3

= -(25) + 3

= - 22

This is the correct answer. Marcus when simplifying his expression took note of the bracket or parentheses sign. This is very important.

Jeremy got 28. His answer is wrong because he squared -5 directly without taking noting that it was in a bracket or parentheses.

Hence this was Jeremy's calculation

-(5²) + 3

= 25 + 3

= 28

Jeremy's answer was wrong. He did not recognize the bracket in his calculation.

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"From 1990 to 2000 The population of city A rose from 12,000 to 28,000 and the population of city B rose from 18,000 to 24,000.
Virty [35]

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The year 1996

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From 1990 to 2000 = 10 years

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For city A

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For city B

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2 years ago
Half of a class took Form A of a test, and half took Form B. Of the students who took form B, 39% passed. What is the probabilit
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