# Variables: 3140

Determine the value of the expression 3a + 2b - a

a) a = - 1, b = 3

b) a = 2, b = -1

c) a = -2, b = -3

d) a = 4, b = 2

e) a = -5, b = 0

^{2}- 4b^{2}for the values of the variables:a) a = - 1, b = 3

b) a = 2, b = -1

c) a = -2, b = -3

d) a = 4, b = 2

e) a = -5, b = 0

### Correct answer:

#### You need to know the following knowledge to solve this word math problem:

#### Grade of the word problem:

## Related math problems and questions:

- Substituting 3165

Determine the value of the expression by substituting for the variables a = 5, b = 2, x = 3, y = 1: k = 4ab + 1/2 ab - 14 l = x² + 2xy + y² m = 5b³ - 4b^{2} - Expression: 4359

Substitute for variables and specify the value of the expression: a) x + y + 2x-3y. x = 1, y = 2 b) a + 5b-a + 4b. a = 8, b = -8 c) mn-5mn + 6mn. M = -3, n = -4 d) k + 10m + 5k-6m + 13km. k = 1, m = 0 - Determine 6621

1) The function f is given: y = I 2-x I + 2. Determine the values of the function in points, i.e., F (-2), f (0), f (1), f (4,8). - Expression 3143

Determine the value of the expression 3x / 2 - 5/2 - 0,5x + 1 for x: a) x = 3 b) x = -3 c) x = 0 - Expression 8151

For what values of x is the value of the expression 5x + 11 equal to that of the expression 7x + 31? - Expression values

Let A = 5, B = 4.4, and C = 4.25. Find the value of each expression listed below. A² × (B - C) B × (A - C) B + C - A A - B + C - The linear

The linear equation 5y-3x-4=0 Can be written in the form y=mx+c. Find the values of m and c. - Fredrik

Fredrik knows that x² + ax + b = 0 has only one solution, and this is x1 = - 3/2 Find the values of a and b. - Zero fraction equation

Find the value of y: 3/5y-9/4 (y +4) -1 = 1/2 (3y-2) -3 (3-y) - Expression 68414

The expression 3x - [2 - (2x - 1) + x] is given. Determine for which numbers x the expression is equal to 0. - Sum of absolute values

Is it possible for |r| + |s| = |r+s|? If so, when? - Vector equation

Let’s v = (1, 2, 1), u = (0, -1, 3) and w = (1, 0, 7) . Solve the vector equation c1 v + c2 u + c3 w = 0 for variables c1 c2, c3 and decide weather v, u and w are linear dependent or independent - Addition method

Solve for the variables by substitution or addition method: x + 3y = 19 5x + 3y = 35 - Determine 2250

The day number is the serial number of the day in the relevant month (i.e., the number on 5 August 2016 is 5). The digit sum of the day is the sum of the values of all digits on the date of that day (i.e., the digit sum on 5 August 2016 is 5 + 8 + 2 + 0 - Determine 82478

Determine the equation of the parabola that has the point F = [3,2] as its focus and the line x+y+1=0 as its shift line. - Equation 23

Find the value of unknown x in the equation: x+3/x+1=5 (problem finding x) - Coefficients 55451

Write a system of 3 linear equations with 3 variables (x. Y. z), which has all non-zero coefficients and a solution x= 2+t, y=3-2t, z=t, where t€R. The fact that the system has all non-zero coefficients means that all numbers in the extended matrix of the