Advertisements
Advertisements
Question
The value of 7a – 4b when a = 3, b = 2 is
Options
21
13
8
32
Advertisements
Solution
13
Explanation;
Hint: 7(3) – 4(2)
= 21 – 8
= 13
APPEARS IN
RELATED QUESTIONS
Get the algebraic expression in the following case using variables, constants and arithmetic operations.
Sum of numbers a and b subtracted from their product.
Factorize x2 - y2 - 4xz + 4z2
Factorize `x^2 + 2sqrt3x - 24`
Factorize `2x^2 + 3sqrt5x + 5`
Factorize the following expressions:
p3 + 27
Factorize the following expressions
8x3 y3 + 27a3
Factorize the following expressions:
54x6y + 2x3y4
Simplify `(173 xx 173 xx 173 xx 127 xx 127 xx 127)/(173 xx 173 xx 173 xx 127 xx 127 xx 127)`
(a – 3b)3 + (3b – c)3 + (c – a)3
If x − y = 7 and xy = 9, find the value of x2 + y2
If x2 + y2 = 29 and xy = 2, find the value of x - y.
Write the value of \[\left( \frac{1}{2} \right)^3 + \left( \frac{1}{3} \right)^3 - \left( \frac{5}{6} \right)^3 .\]
(x + y)3 − (x − y)3 can be factorized as
The factors of x3 − 7x + 6 are
Evaluate: (3c - 5d)(4c - 6d)
Evaluate: (4x2 - 4x + 1)(2x3 - 3x2 + 2)
Evaluate: - 4y (15 + 12y - 8z) (x - 2y)
Divide: 2a2 - 11a + 12 by a - 4
Write in the form of an algebraic expression:
Perimeter (P) of a square is four times its side.
If x = 2 and y = 3, then find the value of the following expressions
2x – 3y
