Answer:
D $170
Step-by-step explanation:
you take the 260 and you plug it in for m and then solve
0.5(260) + 40 = 130 + 40
130 + 40 = 170
This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.
Area of a rectangle:
The area of rectangle of length l and width w is given by:
w(2w + 3) = 9
From this, we get that:
Solving a quadratic equation:
Given a second order polynomial expressed by the following equation:
.
This polynomial has roots such that , given by the following formulas:
In this question:
Thus a quadratic equation with
Then
Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.
Another similar problem can be found at brainly.com/question/16995958
Step-by-step explanation:
8 /3 c - 2 = 2/3 c - 12
Put all the one u want to solve to one side
8 /3 c - 2 = 2/3 c - 12
8/3c - 2/3c = 2-12
6/3c = - 10
Now multiply 3c to both sides
6 = - 30c
c = 6/ - 30
= 1 / - 5
= 1
- - - - - - -
5
Answer:
n1=1,n2=4
Step-by-step explanation:
first divide both sides by 6 of the equation
=n^2-3n=4
n^2-3n-4=0..move the constant to the outerside
n^2-3n-4=0...write -3 as a difference
n^2+n-4n-4=0
factor out n
n×(n+1)-(4n-4)=0
nx(n+1)-4(n+1)=0
(n+1)×(n-4)=0
=n(+1=0)work out
n-4=0
n=-1
n-4=0
now solve for n
and the answer will be ;n1=-1,n2=4