Answer:
(2a-5)² is the final solution
Step-by-step explanation:
4a²-20a+25
= (2a)² - 2 × 2a × 5 + 5²
= (2a-5)²
Answer:
It is -22.3
Step-by-step explanation:
Since it is subtraction, the answer must be smaller than -13.4. -4.5 is bigger than -13.4 so it is incorrect. The answer is -22.3
1. line AB
2. M, B, and D
3. A, B, and C
4. I don't recall, sorry ,:)
Hey there! :D
So, you know the x value. Plug that value in.
-3(-5)+7y= 5(-5)+2y
15+7y= -25+2y
Subtract 15 on both sides.
7y= -35+2y
Subtract 2y on both sides.
5y=-35
Divide both sides by 5.
y=-7.
(-5,-7) <=== the solution.
I hope this helps!
~kaikers
Answer: 200cm
Step-by-step explanation:
The center Planck is a square of length 8cm.
The 4 next planks are of 16 cm each
And the next 4 Planks are of 32 cm each.
8 + 4(8×2) + 4(8×4)
8 + 4(16) + 4(32)
8 + 64 + 128
200 cm
Length of the original plank is 200cm