I think it is y=-.25
7*3 - 4y = 20
21 - 4y = 20
subtract 21 from each side
- 4y = - 1
divide each side by - 4
y= -.25
Answer: 120 cm.
Step-by-step explanation: Each triangle has 3 sides, and each side is 1 cm. Multiply the number of sides for one triangle by the total number of triangles. 3 x 40=120. The perimeter is 120 cm.
2a^2+4a+1 is equivalent to 4a+4/2a*a^2/a+1
Answer:
B, False,
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:
