An electritioncharges a $40 dollar fee to make a house call plus an hourly rate for labor. If the totalbill for a job that takes 2 hours comes to $99, what is the electrician's hourly labor rate

the electrician's hourly labor rate is $25

Step-by-step explanation:

Let x represent the electrician's hourly labor rate.

The electrician charges a $40 dollar fee to make a house call plus an hourly rate for labor. This means that the total bill for a job that takes y hours would be

xy + 40

If the total bill for a job that takes 2 hours comes to $99, it means that

2x + 40 = 90

2x = 90 - 40

2x = 50

x = 50/2

x = 25

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

answer: 75°

step-by-step explanation:

∠esk is the supplement of ∠edk, so is 100°. ∠esd = 1/2·arc ed, so is 25°.

since ∠esk = ∠esd + ∠dsk

you have 100° = 25° + ∠dsk . .

fill in known values 75° = ∠dsk . . . . .

subtract 25°

step-by-step explanation: