Page 111 - Start Up Mathematics_7

2
2
6. Subtract – 7p qr from – 3p qr.
7. Each symbol given below represents an algebraic expression:

2
2
2
2
= 2x + 3y, = 5x + 3x, = 8y – 3x + 2x + 3y
The symbols are then represented in the expression:
+ –
Find the expression which is represented by the above symbols.
8. A taxi service charges ` 8 per km and levies a fixed charge of ` 50. Write an algebraic
expression for the above situation, if the taxi is hired for x km.

9. A triangle is made up of 2 red sticks and 1 blue stick r r . The length of a red stick is given
b
by r and that of a blue stick is given by b. Using this information, write an expression for the
total length of sticks in the pattern given below.

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