Someone ! who is correct? explain your reasoning. alejandra: 2a2b(−2ab3)−2 = (2a2b)(−2ab3)2 = (2a2b)(−2)2a2(b3)2 = (2a2b)22a2b6 = 8a4b7 kyle: 2a2b(−2ab3)−2=2a2b(−2)−2a(b3)−2 = 2a2b(4ab−6) = 2a2bb64a = ab72

Without the use of appropriate symbols and parentheses, it is hard to tell what the problem is. We think you might be trying to simplify
  2·a²b·(-2·ab³)⁻²
  = 2·(-2)⁻²·a²·a⁻²·b·b⁻⁶
  = 2/(4b⁵)
  = 1/(2b⁵)

If so, this would mean neither Alejandra nor Kyle is correct.


First of all, look at the constants. It appears you have a multiplier of 2 at the front, and a multipier of -2 inside parentheses that are raised to the -2 power. The product of these is 2^(1-2) = 1/2. If Kyle's answer is (ab^7)/2, then the constant is correct. As is, Kyle's answer looks like a·b^(72), which is clearly incorrrect.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8

c) 6

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6