75
pls mark brainliest if it helped!
Answer:
8x² - 15y² + xy
Step-by-step explanation:
(4x + 5y) (2x - 3y) + 3xy
multiplying the terms in brackets
(4x) (2x - 3y) + (5y) (2x - 3y) + 3 xy
multiplying with each terms inside the bracket
(4x)(2x) - (4x) (3y) + (5y) (2x) - (5y) (3y) + 3xy
doing the product each of the pair of terms
8x² - 12xy + 10xy - 15y² + 3xy
taking the sum of terms with coefficient "xy"
8x² - 15y² -2xy + 3xy
8x² - 15y² + xy
To find out the circumference of a circle, you have to multiply the diameter of the circle with pi.(3.14)
First, to get the diameter of a circle you have to multiply the radius by 2.

The diameter is 20 centimeters.
Then, multiply the diameter by pi.(3.14)

The circumference is 62.8 centimeters.
-69 is the answer i think
Numbers that have 2 or more factors are called "COMPOSITE NUMBERS"