What is 20% of 45? 15 points

2 answers:

vladimir2022 [97]3 years ago

5 0

The correct answer is 9. If you want it explained go here -->

https://www.mathpapa.com/algcalc2/?utm_expid=69051716-33.zMO_92bXSGuMCLhKsWRggg.3&utm_referrer=https...

hope this helps!

seropon [69]3 years ago

3 0

I believe it is 9 :)

You might be interested in

Concert ticket prices are $18 for a screening with 500 attendees. For each $1 increase in ticket price, attendance decreased by

icang [17]

Answer:

$59

Step-by-step explanation:

Let the revenue will be maximum when $ x is increased in the ticket price.

So, the final ticket price is $(18 + x) and attendance in the concert will be (500 - 5x)

So, revenue R = (18 + x) (500 - 5x) = 9000 + 410x - 5x².......... (1)

Condition for R to be maximum is $\frac{dR}{dx} =0$

So, differentiating equation (1) with respect to x on both sides

$\frac{dR}{dx} =410-10x = 0$

⇒ x = 41

So, the ticket price for maximum revenue is $(18 + 41) = $59 (Answer)

6 0

4 years ago

What is 3/4(x2+4x+6)=13x-2

maxonik [38]

Answer:

$x_1=12.65\\\\x_2=0.685$

Step-by-step explanation:

$\frac{3}{4}(x^2+4x+6)=(13x-2)\\\\Multiply\ both\ sides\ by\ 4.\\\\3(x^2+4x+6)=4(13x-2)\\\\3x^2+12x+18=52x-8\\\\3x^2+12x+18-(52x-8)=0\\\\3x^2+12x-52x+18+8=0\\\\3x^2-40x+26=0$

Roots of Polynomial:

$Roots\ are\ polynomial\ ax^2+bx+c=0\\\\x=\frac{-b\pm \sqrt{(b^2-4ac)}}{2a}$

$Here\ a=3,\ b-40,\ c=26\\\\x=\frac{-(-40)\pm \sqrt{(-40)^2-4\times 3\times 26}}{2\times 3}\\\\x=\frac{40\pm\sqrt{1288}}{6}\\\\x_1=\frac{40+\sqrt{1288}}{6}\approx 12.65\\\\x_2=\frac{40-\sqrt{1288}}{6}\approx 0.685$