19/03/2020 Simplifying Algebraic Expressions(Study by Topics Junior Class) 19/03/2020 0Comments by Gate Academy Welcome to your Simplifying Algebraic Expressions(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. 1/3 of 48y 16y 12y 24y 18y 2. Simplify the following 2y + 9 + 8y + 7 26y 26 10y + 9 + 7 10y + 16 3. Make b the subject of formula b = cd²/ a-c³ b = d²/ a-c² b = a-c³/ cd² b = cd/ a-c³ 4. Simplify 5ab-7ba+4ab 2ab -2ab None 16ab 5. Make y the subject of the relation c-d/ a(c+d) c-d/ acd cd/ a(c-d) c+d/ a(c-d) 6. 4(x + 8) - 9 4x + 32 12x - 9 4x + 24 4x + 23 7. Simplify the expression: 9m - 3n - 7m + 9n 16m - 6n 2(n - 3m) 2(n + 3m) 2(m + 3n) 16n - 6m 8. Expand this (3a + 2)² 9. Simplify 12mn + 18mp 2(6mn + 9mp) 6m(2n + 3p) Noe of these 12(mn + 18mp) 10. Multiply a² + a+ 1 by a² - a + 1 a^4 + 3a² + a + 1 a^4 + 4a² - 6a + 1 a^4 - 6a² - 4a + 1 a^4 + a² + 1 11. Make z the subject of formulasx(y + z) + 5/a -2 = 0 z = 2a -5 -axy/ ax z = 5 -2a -axy/ ax z = 5 -2a -y/ ax z = 2a -5 -y/ ax 12. Q is jointly proportional to the cube of x and the fourth power of y. If x is halved and y is doubled, then the value of Q is decreased in the ratio 4 : 1 increased in the ratio 1 : 4 left unchanged increased in the ratio 1 : 2 13. 6a × 3 18a 20a 9a 15a 8a 14. Simplify 6x - 3y - (4x - 7y) 2x - 10y 10x - 4y 10x + 4y 2x + 10y 2x + 4y 15. If p varies inversely as qr/ q-r, and p = 5 when q = 7 and r = 2, then p is equal to q-r/ 14qr 25(q-r)/ 14qr 14(q-r)/ 25qr 14(q-r)/ qr 16. What number is known as the multiplicative identity? 17. Simplify: 6a - 4b + 8c none of these A(6a - 4 + 8c) 4(2a - b + 2c) 2(3a - 2b + 4c) 18. X varies inversely as y and y varies directly as t². Find the relationship between X and t given that t = 7 when X = 2 X = t²/98 Xt² = 98 X = 98t² 98Xt² = 1 19. Divide a³ - a - 7 + 7a² by (-1 + a²) -a³ + 7a² - a - 7 -a² - 7a + 7 a + 7 a - 7 20. What is the algebraic expression to represent y less than twenty 20 - y Y - 20 Y + 20 20 + 1 out of 20 Time is Up! Time's up