Here are the monthly charges for Jo's mobile phone.
Monthly charge £16
150 free minutes, then 13p per minute
150 free texts, then 15p per text
During one month, Jo makes 170 minutes of calls and sends 182 texts.
Work out the total charge for the month.
In details pls.

£23.40 total for month.

Step-by-step explanation:

£16 for the monthly fee

170 mins - 150 = 20 extra mins = 20 × 13 = 260p or £2.60 for extra mins

182 mins - 150 = 32 extra mins = 32 × 15 = 480p or £4.80 for extra texts

16 + 2.60 + 4.80 = £23.40 total for month.

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