Mathematics
Add:
(a) 2x, 5x
(b) 7p, −2p
(c) 2a + 4b, 9a + 10b
(d) 2xy, 3yx
(e)
Algebra Basics
3 Likes
Answer
(a) 2x + 5x = (2 + 5)x = 7x.
(b) 7p + (−2p) = (7 − 2)p = 5p.
(c) (2a + 4b) + (9a + 10b)
= (2a + 9a) + (4b + 10b)
= 11a + 14b.
(d) 2xy + 3yx = 2xy + 3xy = (2 + 3)xy = 5xy.
(e)
Hence, the sum is .
Answered By
1 Like
Related Questions
Mohini is x years old. Express the following in algebraic form:
(i) three times Mohini's age next year.
(ii) four times Mohini's age 3 years ago.
(iii) the present age of Mohini's uncle, if his uncle is 5 times as old as Mohini will be two years from now.
A bus travels at v km per hour. It is going from Delhi to Jaipur. After the bus has travelled 5 hours, Jaipur is still 20 km away. What is the distance from Delhi to Jaipur?
Subtract:
(a) 12y from 19y
(b) 6z from 5z
(c) 10p from 20p
(d) 13m from 23m
(e) 48n from 50n
Solve:
(a) 6x + (9x − 2x)
(b) 11y + 2y + 3x
(c) 11z + 3z + z
(d) 8ab + (−3ab)
(e) 3x − 4x + 7x
(f) 35b − (16b + 9b)
(g) (9a − 3a) + 4a