Answer:
Grace
Step-by-step explanation:
Chelsea and Roan didn't distribute the negative sign in the second half of the first expression.
-2(x - 8) is
-2(x) + (-2)(-8)
-2x + 16
Answer:
Branliest appreciated
3. x = 14 degrees
4. x = 17.5 degrees
Step-by-step explanation:
SO, The first question:
6x - 21 = 105
6x = 105 -21
6x = 84
x = 14
SO, The second question:
55 + 85 = 8x
140 = 8x
17.5 = x
A regular polygon has ten (10) equal sides ( since it is regular).
We are given with the perimeter value which is 100 units and the perimeter formula is P = 10a
Solving for a (the side measurement), we have:
100 = 10a
a= 100/10
a =10
We can now proceed in solving the area and the formula is shown below:
Area = 5/2 a√ (5+2√5)
Area = 5/2 * 10√(5+2√5)
Area = 76.94 square units
The answer is 96.94 square units.
(7x - 2y) (3x +5y) ( First open brackets)
= 21x² + 35xy - 6xy - 10y² ( solve like terms)
= 21 x² - 10y² + 29xy.
