Cindy says she found a shortcut for doing multiplication problems. When she multiplies 3x24, she says,"3x4 is 12ones, or 1ten and 2ones. Then, there’s just 2tens left In 24, so add it up, and you get 3tens and 2ones." Do you think Cindys shortcut works? Explain your thinking in words, and justify your response using a model or partial products.

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

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

$119.20

step-by-step explanation:

$372.50 - 60% off is $149. $149-20% off is $119.20

and?

step-by-step explanation: