[8] meaning. what's the [ ] mean

Mathematics

1 answer:

kotykmax [81]4 years ago

6 0

It changes it into negative

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The sum of three times a number x and nine"

ira [324]

Answer:

3x+9

Step-by-step explanation:

you are multiplying 3 and x because it says "three times a number x" which means 3x and you are adding it to 9 which is 3x+9.

6 0

3 years ago

The net profit in dollars per day for a small business owner is given by the equation f(x) = -0.1x^2 + 6 x + 4, where x is the n

notsponge [240]

Answer:

$\large \boxed{\sf \ \ \text{The maximum profit is \$94 per day.} \ \ }$

Step-by-step explanation:

Hello,

The coefficient in $x^2$ is negative.

So, there is a maximum at the vertex point which is

$x=-\dfrac{b}{2a}==\dfrac{-6}{-0.2}=\dfrac{6}{0.2}=30$

And then the maximum is f(30)=

$-0.1\cdot 30^2+6\cdot 30 +4=-90 +180+4=94$

So the maximum profit is 94 $ per day.

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

6 0

3 years ago

If j(x) = x4 - 81, and k(x) = x + 3 then j(x) k(x) =

Bad White [126]

Hi there!
The question here is asking us to multiply two functions together - j(x) and k(x). First, we need to determine the expressions for j(x) and k(x). Since this is given, we can move straight onto multiplying the two functions together, which will give us our answer.
j(x) × k(x)
Substitute expressions -
(x⁴ - 81)(x + 3)
Simplify -
(x⁴ - 81)(x + 3)
x⁵ + 3x⁴ - 81x - 243
Therefore, the answer is x⁵ + 3x⁴ - 81x - 243. Hope this helped!

8 0

4 years ago

Read 2 more answers

a flashlight has 6 batteries, 2 are defective. what is the probability you select at least 1 good battery

irga5000 [103]

Answer:hhthfgh

Step-by-step explanation:

htrhghyrjyjytrhytrh

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3 years ago

An acute angle θ is in a right triangle with sin θ = eight ninths. What is the value of cot θ? nine divided by the square root o

snow_lady [41]