A dog trainer compared mean numbers of lessons for two groups of dogs to learn a new trick.

Mean number of lessons Mean Absolute Deviation (MAD)

Group A 15

3

Group B 9

3

Which statement about the data is true?

A. The MAD for group A is more than the MAD for group B.

B. The mean number of lessons for group A is greater than the mean

for group B by 6 MADs.

C. The mean number of lessons for group A is greater than the mean

for group B by 2 MADs.

D. On average, the dogs in group B required more lessons than the

dogs in group A.

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

step-by-step explanation:

your mom

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

idk

step-by-step explanation: