868 is about 870, and 28 is about 30, so your expression would be 870 divided by 30 which would be 29 and the actual answer is 31, so your estimate would be close to your actual answer.
8x^2 + 9 - 6x^2 - 2x - 2
= 2x^2 - 2x + 7
answer is B
2x^2 - 2x + 7
Answer:
-5.6666.... is a rational number and 3.25 is a rational number but not integer too. the rest you got all right, good job.
hope that answers your question
dont hesitate to comment if you need some explanation about this topic
Answer:
the way to find triangle is A=1/2
Step-by-step explanation:
For the rectangle: l x w = Area
l = 18
w = 18
18 x 18 = 324
If 16m is for dash line
1/2bh
1/2(16)(16)
4(16) = 64
1/2bh
1/2(8)16
8(8) = 64
324 + 64 + 64 = 452
Your area should be 452m²
hope this helps
