1. 0.95
2. -0.125
3. 3.4
4. 0.7 (repeating 7)
5. 0.73 (repeating 3)
6. 2.6 (repeating 6)
To complete the square we get the coefficient of x, divide it by 2 then square it.
-3/4 divided by 2 =
-3/8 and then squared it equals
9 / 64
answer is a
Answer:
128degrees
Step-by-step explanation:
Note that the given triangle ABC is an isosceles triangle with base angles equal, hence;
m∠BAC = m∠BCA
7x+1 = 5x+9
7x - 5x = 9-1
2x = 8
x = 8/2
x = 4
m∠BAC = 5x+6
m∠BAC = 5(4)+6
m∠BAC = 26 degrees
The vertex angle = 180 - (26+26)
The vertex angle = 180 - 52
The vertex angle = 128degrees
Check the tessellation picture below.
now, bear in mind that, you're asked on "regular pentagons", no irregular like the ones in the left-hand-side in the picture. Now, notice the ones in the right-hand-side, those are regular pentagons... well, do they tessellate?