Answer:
The expression has two variables x and y.
Step-by-step explanation:
<u>What is a variable?</u>
A variable is a letter, for instance or , that represents an unknown number.
Given the expression
The given expression has three terms which are x, 4y, and -9.
Here:
- The term 'x' is the unknown variable x.
- The term '4y' has a coefficient (the number next to a variable y) of 4.
- The term '-6' is a constant.
As we already know that a variable is a letter, for instance x or y, that represents an unknown number. In other words, the values of x, or y are unknown to us.
Thus, the expression has two variables x and y.
Answer:
- perimeter: 42 units
- area: 73.5√3 ≈ 127.3 square units
Step-by-step explanation:
The side length of the hexagon is equal to its radius: 7. The perimeter is 6 side lengths, so is
perimeter = 6·7 = 42 . . . units
__
The area is half the product of the perimeter and the apothem. The apothem is cos(30°) = (√3)/2 times the side length, so is (7√3)/2.
A = 1/2·perimeter·apothem
area = (1/2)(42)(7√3)/2 = 73.5√3 . . . square units
Answer:
4 option
Step-by-step explanation: