First of all, division is the opposite of multiplication. So if I
divide 72 by 3 I should get 24, since 3*24 = 72.
275??
16×=4400
16×/16=4400/16
x=275
Answer:
x = 2
Step-by-step explanation:
A parallelogram is a figure with four sides in total, and two parallel opposite sides.
This means that the opposite sides are equal in length.
For the parallelogram ABCD in this problem, we are told that the length of two opposite sides are:
![15x+5](https://tex.z-dn.net/?f=15x%2B5)
and
![20x-5](https://tex.z-dn.net/?f=20x-5)
The two sides must be equal in order for ABCD to be a parallelogram, so we can write:
![15x+5=20x-5](https://tex.z-dn.net/?f=15x%2B5%3D20x-5)
And now we solve for x: first, we add +5 on both sides,
![15x+5+5=20x-5+5\\15x+10=20x](https://tex.z-dn.net/?f=15x%2B5%2B5%3D20x-5%2B5%5C%5C15x%2B10%3D20x)
Then we subtract 15x on both sides:
![15x+10-15x=20x-15x\\10=5x](https://tex.z-dn.net/?f=15x%2B10-15x%3D20x-15x%5C%5C10%3D5x)
Finally, we divide both sides by 5:
![x=\frac{10}{5}=2](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B10%7D%7B5%7D%3D2)
Answer:
$15700
Step-by-step explanation:
To find the cost, you multiply $50 by the area of the floor. The floor must be a circle ("radius"), so to find the area of a circle, use the formula![A=\pi r^2 \\ A=\pi(10)^2 \\ A=(3.14)(100)=314\text{ square feet}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E2%20%5C%5C%20A%3D%5Cpi%2810%29%5E2%20%5C%5C%20A%3D%283.14%29%28100%29%3D314%5Ctext%7B%20square%20feet%7D)
Multiply 314 sq. ft. by the cost per sq. ft.
314 x 50 = 15700
(a - 2b) • (2a - b) is how you factor this using FOIL