The value of 21b – 32 + 7b – 20b is:
WebThe expression 21b - 32 + 7b - 20b on simplification gives. Q. If 8 C r = 8 C r + 2, then the value of r C 2 is. Q. The value of x 1 / 2.y ... WebApr 27, 2024 · The value of 21b - 32 + 7b - 20b is: 12. 20 − 3 = 17. For example, 10x + 63 and 5x - 3 are examples of algebraic expressions. . Class 8 Maths Algebraic Expressions and Identities Very Short Answer Type Questions "product of -3 and x" means that you multiply -3 by x, creating (-3x) Advertisement New questions in Mathematics Find the volume of ...
The value of 21b – 32 + 7b – 20b is:
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WebJun 28, 2024 · (i) 21b – 32 + 76 – 20b Combining the like terms, we have (21b + 7b – 20b) + (- 32) = (21 + 7 – 20) b + (- 32) = 8b – 32 (ii) -z 2 + 13z 2 – 5z + 7z 3 – 15z Combining like terms, we get = 7z 3 + (-z 2 + 13z 2) + (-5z – 15z) = 7z 3 + (-1 + 13)z 2 + (- 5 – 15)z = 7z 3 + 12z 2 – 20z (iii) p- (p-q)-q- (q-p) = p- p + q – q – q + p WebYou have 5a ⋅b = 3b ⋅b −2a ⋅a 15a ⋅b = −7b ⋅ b− 2a ⋅ a so subtract the 2nd equation from the first to get −10a ⋅ b = 10b ⋅b ⇒ b⋅ b = −a ⋅b Also 35a ⋅ b = 21b ⋅b −14a⋅ a ... Dot product of …
WebBasic Math. Math Calculator. Step 1: Enter the expression you want to evaluate. The Math Calculator will evaluate your problem down to a final solution. You can also add, … WebThe value ofvariable is the solution ofthe expression. 10. The general (nth)term ofa number pattern (or a sequence) is an expression is n. ... 21b - 32 + 7b- 20b =21b + 7b - 20b - 32 (Rearranging like terms) = (21 + 7-20)b - 32 =8b -32. (ii) - z2 + 13z2- 5z + 7z3 - 15z =7z3 _Z2 + 13z2- 5z -15z (Rearranging like terms)
WebNov 10, 2024 · The value of 21b – 32 + 7b – 20b is: (a) 48b – 32 (b) -8b – 32 (c) 8b – 32 (d) 28b – 52 12. The value of expression 7a – 4b for a = 3, b = 2 is: (a) 13 (b) 7a – 6b (c) 21a … WebThe expression 21b - 32 + 7b - 20b on simplification gives one of the following expressions: A. 8b + 32 B. 8b - 32 C. 32 - 8b D. 24b. ... Find the value of the following expression using suitable property: 725 × (-35) + (-725) x 65. ... China 32 18 14 21 21. 34. Town A is 60 km from town B, and 61 km from town C. ...
WebSimplifying and combining like terms we get: (i) 21b - 32 + 7b - 20b = 8b−32 (ii) -z 2 + 13z 2 - 5z + 7z 3 – 15z = 7z 3 + 12z 2 – 20z (iii) p – (p – q) – q – (q – p) = p − q (iv) 3a – 2b – ab …
WebQuestion 1 : Get the algebraic expressions in the following cases using variables, constants and arithmetic operations: (i) Subtraction of z from y. (ii) One half of the sum of numbers x and y. (iii) The number z multiplied by itself. (iv) One-fourth of the product of numbers p and q. (v) Numbers x and y both squared and added. chilean charm facebookWebNov 10, 2024 · The value of 21b – 32 + 7b – 20b is: (a) 48b – 32 (b) -8b – 32 (c) 8b – 32 (d) 28b – 52. 12. The value of expression 7a – 4b for a = 3, b = 2 is: (a) 13 (b) 7a – 6b (c) 21a – 8b (d) 29. 13. Factors of the term 15x 2 in the expression 15x 2 – 13x are: (a) 15, x, x (b) 15, … gpower exactWebMar 18, 2024 · (2) Simplify: 21b-32+ 7b-20b (3) Find the value of (4) Simplify (-2)³ × (-10) (5) Find the area of a triangle whose base is 4 cm and height is 3 cm. How many segments are required to form a 9 digits of 8 g power exact testWeb(i) 21b – 32 + 7b – 20b Solution:- When terms have the same algebraic factors, they are like terms. Then, = (21b + 7b – 20b) – 32 = b (21 + 7 – 20) – 32 = b (28 – 20) – 32 = b (8) – 32 = 8b – 32 (ii) – z2 + 13z2 – 5z + 7z3 – 15z Solution:- When terms have the same algebraic factors, they are like terms. Then, = 7z 3 + (-z 2 + 13z 2) + (-5z – 15z) chilean cedarWebi. 21b – 32 + 7b – 20b = 21b – 20b + 7b – 32 = 8b -32. ii. – z 2 + 13z 2 – 5z + 7z 3 – 15z = 7z 3 – z 2 + 13z 2 – 5z – 15z = 7z 3 + 12z 2 – 20z. ... Find the value of the following expression, when x = -1: i. 2x – 7 ii. -x + 2 iii. x 2 + 2x + 1 iv. 2x 2 – x – 2. i. 2x – 7 = 2 × (-1) – 7 = -2 – 7 = … gpower discrete and continuous variableWebExercise 12.2. Question 1: Simplify combining like terms: (a) 21b–32 + 7b–20b 21 b – 32 + 7 b – 20 b. Answer: 21b–32 + 7b–20b 21 b – 32 + 7 b – 20 b. = 21b + 7b–20b– 32 = 21 b + … chilean central bankWebAlgebraic Expressions (Maths) Class 7 - NCERT Questions. Q 1. Get the algebraic expressions in the following cases using variables, constants and arithmetic operations. (i) Subtraction of z from y. (ii) One-half of the sum of numbers x and y. (iii) The number z multiplied by itself. chilean carmenere wine