15x-6

21x/2+3. Multiply everything by 2: 30x-12=21x+6. Combine like terms: 9x=18. Get the unknown by itself: 9x/9=X. 18/9=2. X is less than or equal to 2 :)
B(-4; 1)
3 units right → x + 3
2 units down → y - 2
B'(-4 + 3; 1 - 2) → B'(-1; -1)
Answer:
I.I
R.R
Step-by-step explanation:
R.R would be R.RRRR......
and I.I would be I.IIII...
In equation form, that would be 2(x+2)=9.
Answer:
The perimeter is the measure or length of the outline of an object or a shape.
The perimeter of the double headed arrow is,
= 7.9 cm + 7.9 cm + 5.1 cm + 5.1 cm + 5.1 cm + 5.1 cm + 1.2 cm + 1.2 cm + 1.2 cm + 1.2 cm.
= 2 × 7.9 cm + 4 × 5.1 cm + 4 × 1.2 cm.
= 15.8 cm + 20.4 cm + 4.8 cm.
= 41 cm.
Step-by-step explanation: