Aphone company offers two monthly plans. plan a costs $16
plus an additional $0.13 for each minute of calls. plan b costs $28 plus an additional $0.09 for each minute of calls.

for what amount of calling do the two plans cost the same? minutes

what is the cost when the two plans cost the same? $

For what amount of calling do the two plans cost the same? __300__ minutes

What is the cost when the two plans cost the same? $ __55__

Step-by-step explanation:

We have 2 plans, A and B. We must find an equation that relates the cost of the plan based on the number of minutes of calls.

For plan A we have:

Fixed cost of $ 16.

Variable cost of 0.13(m)

Where m represents the minutes of additional calls.

Then the equation for the cost is:

For plan B we have:

Fixed cost of $28.

Variable cost of 0.09(m)

Where m represents the minutes of additional calls.

Then the equation for the cost is:

To find out when the plans cost the same, we must equalize both equations and solve for m:

When the number of additional minutes is 300 the costs of the plans are equal to:

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:

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)