Kim is showing her steps to solve the expression −18.9 ÷ 1/4 . answer? ?

in which step did kim make an error?

step 1: −18.9 ÷

step 2: −18.9 ⋅ 4

step 3: 75.6

a: step 1

b: step 2

c: step 3

d: there is no error.

There is no error because -18.9 divided by 1/4 is acccaully  75.6

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct