Answer:
B. 1/2
Step-by-step explanation:
y = ax^2 + bx + c
14 = a(0)^2 + b(0) + c
c = 14
10.5 = a(1)^2 + b(1) + 14
10.5 = a + b + 14 ____(i)
8 = a(2)^2 + b(2) + 14
8 = 4a + 2b + 14
4 = 2a + b + 7 ___ (ii)
i - ii
10.5 - 4 = -a + 7
6.5 = -a + 7
a = 7- 6.5
a = 0.5
Vertical angles are equivalent so
7x-4=87
and 4 to both sides to remove the negative numbers, the new equation is
7x=91
Then divide both sides by 7 and you get the answer
1x=13
Makes sense?
The area of the room must equal the sum of the areas of the tiles...
20*30=n(2*3)
600=6n
n=100
So 100 tiles are needed.
Answer:
PS = 7x - 7
Step-by-step explanation:
PS = PR + RS = 4x - 2 + 3x - 5 = 7x - 7