John and Sam have a lawn mowing service. At one home, John can mow the lawn by himself in 2 hours, but it takes Sam 1.5 hours. How many hours t will it take them to mow the same lawn together? Give the answer correct to one decimal place. (Enter a number.)

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

a

step-by-step explanation: