1 of 5 © In a group of 23 pupils, 4 play the flute only.
3 play the piano only.
15 play neither instrument.
A student is selected at random.
What is the probability the student plays both instruments?

step-by-step explanation:

a rhombus is a parallelogram enjoying his symmetry.

1010: 3030

is it i think

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