What we can do is set up an algebraic equation.
our variable can me L for Length
3L+4L+5L=90
now all we have to do is solve
12L=90
---- ----
12 12
L=7.5
now multiple each number in the ratio by 7.5 to find out how long each side is
3 times 7.5 is 22.5
4 times 7.5 is 30
5 times 7.5 is 37.5
the side lengths are 22.5, 30, and 37.5
Answer:
$91.67.
Step-by-step explanation:
We have been given that Mark is creating a tarp to cover his new vegetable garden outside. He needs enough nylon to cover the garden which is 10 feet by 8 feet and then he will attach rope along the edges of the nylon to stake it down with.
A. Let us find area covered by nylon by multiplying 10 by 8.


Now let us convert area of needed nylon from square feet into square yard by multiplying 80 by 0.111111.

Now let us multiply 8.88889 by 5.25 to find the cost of nylon cover of the garden.


Therefore, the cost of nylon cover will be $46.67.
B. Now let us find length of rope by finding the perimeter of the garden.



Now let us find the cost of 36 feet long rope by multiplying 36 by 1.25.


Therefore, the cost of rope will be $45.
To find the total cost to make the cover we will add cost of nylon cover and cost of rope.


Therefore, it will cost $91.67 for Mark to make the cover for vegetable garden.
...... I need this as well please help us!!!
Answer: (13x+8)(13x-8) is the answer