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Let j(x) = x^2 − 2x + 4. Evaluate the following. (A) j(a). (B) j(3). (C) j(x^2). (D) j(x + 3). (E) j(x + h)?
A.) j(a) = a^2 - 2a + 4
B.) j(3) = (3)^2 - 2(3) + 4 = 9 - 6 + 4 = 7
C.) j(x^2) = (x^2)^2 - 2(x^2) + 4 = x^4 - 2x^3 + 4
D.) j(x+3) = (x + 3)^2 - 2(x + 3) + 4 = x^2 +6x + 9 - 2x - 6 + 4 = x^2 + 4x + 7
E.) j(x+h) = (x + h)^2 - 2(x + h) + 4 = x^2 + 2hx + h^2 - 2x - 2h + 4
What else can I help you with?
If 12 is decreased by twice a number is -7 what is the number?
Let the number be x 12-2x = -7 -2x = -7-12 -2x = -19 x = 9.5
7 less then twice a number?
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
What is 4 more than twice a number?
If we let the number be represented as ( x ), then twice the number can be expressed as ( 2x ). Adding 4 to this gives us the expression ( 2x + 4 ). Therefore, 4 more than twice a number is ( 2x + 4 ).
What are two consecutive even integers such that the smaller added to 3 times the larger gives a sum of 22?
Suppose n is the smaller integer. Since it is even, let n = 2x where x is an integer. Then the second integer is 2x+2 So 2x + 3*(2x+2) = 22 2x + 6x + 6 = 22 8x + 6 = 22 Subtract 6 from both sides: 8x = 16 Divide both sides by 4: 2x = 4 So the two integers are 2x and 2x+2 ie 4 and 6
What are the factors of the following trinomial 2x2 plus 7x plus 3?
(2x + 1)(x + 3) are the factors.
How do you evaluate 3m-2x?
5
Let g(x) = 2x and h(x) = x2 + 4. Evaluate (h ∘ g)(−5)?
104
Substitute 7 for x and evaluate the expression 9x - 2x?
X = 7 9x - 2x = 49
Replace 7 for x and evaluate the expression 9x - 2x?
X = 7 9x - 2x = 49
What does evaluate 2x for each value of x mean?
to divide
Substitute 6 for x and evaluate the expression below5x plus 2x?
X = 6 5x + 2x = 42
How would you evaluate the indefinite integral -2xcos3xdx?
Integrate by parts: ∫ uv dx = u ∫ v dx - ∫ (u' ∫ v dx) dx Let u = -2x Let v = cos 3x → u' = d/dx -2x = -2 → ∫ -2x cos 3x dx = -2x ∫ cos 3x dx - ∫ (-2 ∫ cos 3x dx) dx = -2x/3 sin 3x - ∫ -2/3 sin 3x dx = -2x/3 sin 3x - 2/9 cos 3x + c
Plato web answer key?
Evaluate the expression below when x = 2.3x2-2x+4
What is the derivative of ln2x?
Let y = ln (2x), let u = 2x. Then:dy/dx = dy/du * du/dx= 1/(2x) * 2= 1/x.
How do you factor the following polynomial 4x2 plus 81-36x?
(2x - 9)(2x - 9)
How Do you Graph The Following Equation -2x plus 3y equals 1?
-2x plus 3y equals 1
Double me and add on nine By then you have the square of seven?
Let yourself be known as x: 2x+9 = 72 2x+9 = 49 2x = 49-9 2x = 40 x = 20
