Colin predicted whether he got answers right or wrong in his 50 question exam. He identified the 18 questions he thought he got wrong. It turns out that Colin got 3 questions right that he thought he got wrong. Colin also got a total score of 27 out of 50 in the test. What is the percentage accuracy he had with predicting his scores?

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

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