Question

(a) Subtract the sum of 4x + 5y +9z and −2x + 6y − 4z from the sum of 3x – 4y + 8z and 5x + 7y – 4z.
(b) Find the product: 2xy, 8yz, -5x

Answer 1

Answer:

(B) I WILL DO B ONE FOR YOU

Step-by-step explanation:

2xy×8yz×-5x

(2) (2)

x×y×z=8×2×5

(2)(2)

x×y×z=80

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Answer 2

Answer:





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Class 8

>>Maths

>>Algebraic Expressions and Identities

>>Operations on Algebraic Expressions

>>The sum of 3x + 4y - 5z, 5y + 2x, 7x - 8

Question



The sum of 3x+4y−5z, 5y+2x, 7x−8y and 4x−9y−5z is

A

16x−8y−10z

B

8x−16y−5z

C

116x+8y+10z

D

None of these

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Solution



Verified by Toppr

Correct option is A)

Adding the given terms:

(3x+4y−5z)+(5y+2x)+(7x−8y)+(4x−9y−5z)=x(3+2+7+4)+y(4+5−8−9)+z(−5−5)

                                                                                                       =16x−8y−10z

Hence, Option Anser is correct.