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4.9 SPM Practice (Short Questions)

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Question 1:
(1462)+3(204−3)−(−30−2−5)

Solution:
(1462)+3(204−3)−(−30−2−5)=(1462)+(6012−9)−(−30−2−5)=(7418−7)−(−30−2−5)=(7−(−3)4−018−(−2)−7−(−5))=(10420−2)



Question 2:
Find the value of m in the following matrix equation:
(9−450)+12(8m6−10)=(13−7−21)

Solution:
(9−450)+12(8m6−10)=(13−7−21)−4+12m=−712m=−3m=−6



Question 3:
Given(2x3y)−4(−23)=(−26)Find the values of x and y.

Solution:
2x+8=−22x=−10x=−53y−12=63y=18y=6




Question 4:
Given that matrix equation 3(6  m)+n(3  4)=(12  7), find the value of m + n

Solution:
3(6  m)+n(3  4)=(12  7)18+3n=123n=−6n=−23m+4n=73m+4(−2)=73m=15m=5∴