What is the value of x3 + 4, when x = 6?

2 answers:

6 0

Well let’s remember the rules of pemdas.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

Since 6 has a exponent of 3 we could do 6^3 before adding 4. 6^3= 216

So then we would have 216+4.

That would equal 220. The value when x=6 is 220.

tresset_1 [31]4 years ago

5 0

Plug in 6 for x
3(6) + 4 = 22
The value if 22, or you can write it like:
f(6) = 22

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The table shows a linear function. <br><br> Which equation represents the function.

mote1985 [20]

Answer:

$\large\boxed{f(x)=\dfrac{3}{2}x-1}$

Step-by-step explanation:

$\text{The slope-intercept formula:}\\\\y=mx+b\\\\m\ -\ slope\\b\ -\ y-intercept\\\\\text{The formula of a slope:}\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\\\\\text{From the table we hve two points (0, -1) and (2, 2). Substitute:}\\\\m=\dfrac{2-(-1)}{2-0}=\dfrac{3}{2}$

$\text{Therefore the equation is}\ f(x)=\dfrac{3}{2}x-1\\\\\text{Check for the point (4, 5):}\\\\f(4)=\dfrac{3}{2}(4)-1=(3)(2)-1=6-1=5\qquad\ CORRECT$