All categories

3 years ago

Define a variable, write an equation, and solve.

Mathematics

1 answer:

allochka39001 [22]3 years ago

3 0

Answer:

c(m) = 39.95 +0.35m
85 minutes over 500

Step-by-step explanation:

Let m represent the number of minutes used over 500. Then the cost of the cell phone plan is ...

c(m) = 39.95 +0.35m

For a cost of 69.70, the number of excess minutes can be found by solving ...

69.70 = 39.95 +0.35m

29.75 = 0.35m . . . . . . . . . subtract 39.95

29.75/0.35 = m = 85 . . . . divide by the coefficient of m

The number of minutes of usage over 500 is 85.

You might be interested in

Write the equation of the line that passes through the points (-6, -9) and (7, 7).

Rus_ich [418]

Answer:

$\displaystyle y + 9 = \frac{16}{13} ( x + 6 )$

Step-by-step explanation:

The point-slope form of the equation of a line is:

y - k = m ( x - h )

Where m is the slope and (h,k) is a point through which the line passes.

Given a line passes through points A(x1,y1) and B(x2,y2), the slope can be calculated with the equation:

$\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

We are given the points (-6,-9) and (7,7), thus the slope is:

$\displaystyle m=\frac{7+9}{7+6}=\frac{16}{13}$

Now we apply the point-slope formula using the point (-6,-9):

$\mathbf{\displaystyle y + 9 = \frac{16}{13} ( x + 6 )}$

This equation is expressed in the required format

6 0

3 years ago

See if you can answer this :DD 9-16/2^3*4-7

IceJOKER [234]

Answer: -6

Step-by-step explanation:

3 0

4 years ago

HELP 1/7z+2=-6/7z what’s the solution set please send help I’m suffocating under homework

Snezhnost [94]

Isolate the z. Note the equal sign. Subtract 1/7z to both sides

1/7z (-1/7z) + 2 = -6/7z (-1/7z)

2 = -6/7z - 1/7z

Simplify. Combine like terms

2 = -7/7z

2 = -1z

Isolate the z. Divide -1 from both sides

(2)/-1 = (-1z)/-1

z = 2/-1

z = -2

-2 is your answer

hope this helps

8 0

3 years ago

All the constants of the expression 2+6a

olya-2409 [2.1K]

What do you mean? you need to add more

4 0

3 years ago

Help!!!!! 50(1+0.05)7 what is the future amount=

MAXImum [283]

Answer:

$70.36$

Step-by-step explanation:

$50(1+0.05)^7$

$50 \times (1.05)^7$

$=70.355021$

4 0

4 years ago

Read 2 more answers