Question

Multiple Choice Questions (MCQs)
Tick () the correct option.
12. You write an essay for your final exam worth 40 marks. The teacher deducts 12 points for incorrect
grammar and gave 7 bonus points for creativity. Which expression does not represent your final score?
(a) 40 - 12+7
(b) 40 + (-12)+7 (c) 401 +1 -12 +171 (d) 1401-1-121 +171
13. Preeti had mixed fruit juice in a jar that had a temperature of 10°C. She poured it into 6 glasses and froze
the juice to -2°C. What is the change in temperature of the juice?
(a) -4°C
(b) -12°C
(c) 4°C
(d) 12°C​

Answer 1

Given:

12. You write an essay for your final exam worth 40 marks. The teacher deducts 12 points for incorrect grammar and gave 7 bonus points for creativity.  

13. Preeti had mixed fruit juice in a jar that had a temperature of 10°C. She poured it into 6 glasses and froze the juice to -2°C.  

To find:

Which expression does not represent your final score?

What is the change in the temperature of the juice?

Solution:

From given, we have,

12. The final exam was worth 40 marks.

Teacher deducted (-) 12 and gave (+) 7 bonus points

⇒ 40 - 12 + 7

Option (a) is correct.

13. Initial temperature of juice was 10 °C

Then froze the juice to -2°C

10 °C to 0 °C = -10 °C  

-10 °C + (-2 °C) = -12 °C

Option (b) is correct.