2. Find the value of :
1. p+ 2q, +3 r, when p=1, q=5 , r=2
2. 2a+4b+5c ,when a=5 , b=10 , c=20
3. 3a-2b , when a=8, b=10
with process
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2. Find the value of :
1. p+ 2q, +3 r, when p=1, q=5 , r=2
2. 2a+4b+5c ,when a=5 , b=10 , c=20
3. 3a-2b , when a=8, b=10
with process
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Answer:
(i) p + 2q + 3r
= 1 + 2 × 5 + 3 × 2
= 1 + 10 + 6 = 17
(ii) 2a + 4b + 5c
= 2 × 5 + 4 × 10 + 5 × 20
= 10 + 40 + 100 = 150
(iii) 3a – 2b = 3 × 8 – 2 × 10
= 24 – 20 = 4
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