Answer:
![A=2x^2+3x-5](https://tex.z-dn.net/?f=A%3D2x%5E2%2B3x-5)
Step-by-step explanation:
Given that,
Length = (2x+5) cm
Width = (x-1) cm
We need to find the area of a rectangle. The formula for the area of rectangle is given by :
A = lb
![A=(2x+5)(x-1)\\\\=2x^2-2x+5x-5\\\\=2x^2+3x-5](https://tex.z-dn.net/?f=A%3D%282x%2B5%29%28x-1%29%5C%5C%5C%5C%3D2x%5E2-2x%2B5x-5%5C%5C%5C%5C%3D2x%5E2%2B3x-5)
So, the required area is equal to
.
Answer:
897 liters
Step-by-step explanation:
The motor oil is composed of 8 liters of natural oil and 5 liters of synthetic oil. This means there is a ratio of 8/5. We have 552 liters of natural oil to y liters of synthetic. This is the ratio 552/y. Create a proportion that compares the two ratios.
![\frac{8}{5}=\frac{552}{y}](https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B5%7D%3D%5Cfrac%7B552%7D%7By%7D)
Solve by cross multiplying.
8y = 5(552)
8y = 2,760
y= 345
345 liters of synthetic oil.
Together 552+345= 897 liters of motor oil.
Answer:
82 degrees.
Step-by-step explanation:
Answer: 110 square cm
=======================================================
Explanation:
All sides of a regular polygon are the same length. So the bottom side is also 8 cm.
Draw lines from the center to each vertex of the pentagon. Five triangles form. Each triangle has a base of 8 and a height of 5.5 (since all five triangles are congruent)
area of one triangle = 0.5*base*height = 0.5*8*5.5 = 22
area of five triangles = 5*(area of one triangle) = 5*22 = 110
Answer:
i just did that earler lol
Step-by-step explanation: