An international calling plan charges a rate per minute plus a flat fee. a 10-minute call to france costs $3.19. a 15-minute call to france costs $4.29. write and solve a linear equation to find the cost of a 12-minute phone call to france

Question

01-02-2018
Business

contestada

An international calling plan charges a rate per minute plus a flat fee. a 10-minute call to france costs $3.19. a 15-minute call to france costs $4.29. write and solve a linear equation to find the cost of a 12-minute phone call to france

Respuesta :

Otras preguntas

According to the food and nutrition board (fnb) of the national academy of sciences, ______ of kilocalories should come from protein.

if f(x)= 2x^2+5sqrt(x-2), complete the following statement: The domain for f(x) is all real numbers _____ than or equal to 2. (fill in the blank)

Find constants a and b such that the function y = a sin(x) + b cos(x) satisfies the differential equation y'' + y' − 8y = sin(x).

Which of these numbers is an irrational number? of these numbers is an irrational number? 3⁄5, Square root of 4, Square root of 25, Square root of 20, 5/3

Simplify. (4x4 + 7x2 + 6x) - (x3 - 7x + 10) A) 4x4 + 6x -10 B) 3x3 + 6x + 10 C) 3x7 +14x3 - 4x D) 4x4 - x3 + 7x2 + 13x - 10

. The acronym CPCTC stands for “__________ parts of congruent triangles are congruent.” calculated congruent corresponding coordinated

Name a geometric technique that can give an illusion of depth to a two-dimensional figure. a. Fibonacci sequence c. Golden mean b. one-point perspective

(Use the Pythagorean theorem to answer the question.) An airplane takes off going straight west at 340 km/h for 1 hour, then turns and heads south for another h

Heather is training for a long-distance run. Her data points listed below represent the days of practice, x, and the number of miles run, y. (1, 2.5), (2, 4.2),

The event in the 1700s that advanced human services in the United States occurred when Congress established a federal chain of hospitals for the relief of _____

Kalahira Kalahira · Answer 1 · 2018-02-14T23:33:41+01:00

Let flat fee for call be X and rate per minute be Y.
So our equation for 10 minutes of call becomes X + 10Y = 3.19 ------------(1) And X + 15y = 4.29 for 15 minutes------------------------(2)
Subtracting equations (2) from (1)
5y=1.10
Y = 1.10/5 = 0.22
Substituting value for y In (1) we have
X + 10(0.22) = 3.19
X = 3.19 - 2.2 = 0.99
Since we have obtained flat fee for call and rate per minute
The cost for 12 minute call
X + 12Y
0.99 + 12(0.22)=3.63
The fee for 12 minuter call =$ 3.63