21. Kim and Yolanda are watching a movie in a movie theater. Yolanda is sitting x feet from the movie screen, and Kim is 15 feet behind Yolanda. The angle that Kim's line of sight to the top of the screen
makes with the horizontal is 30°. The angle that Yolanda's line of sight to the top of the screen
makes with the horizontal is 45°.
How far is Yolanda from the screen? Round your
answer to the nearest tenth.
xra
30° 135/45
15 ft +
xft

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

a

step-by-step explanation:

the denominator cannot be the same as one of the factors.

8 denominator times 2 denominator = 16

and 7 numerator time 11 = 77

77/16= 77/16 ( they cannot be further simplified)

i don't even know how to read that, ill try to do it if you translate it into english.

a. george's love for snowboarding, bungee, jumping, and whitewater kayaking has lead to a scholarship.