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Cloud [144]
2 years ago
7

Mary purchased a prepald phone card for $30. Long distance calls cost 8 cents a minute using this card. Mary used her card only

once to make a long distance
call. If the remaining credit on her card is $26.16, how many minutes did her call last?
Mathematics
1 answer:
julia-pushkina [17]2 years ago
4 0
Hey can I have brainlyist I only need one more :)
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What is the inverse of the function f(x) = 2x – 10?
Lana71 [14]

Answer:

h(x)=\dfrac{x}{2}+5

Step-by-step explanation:

You are given the function f(x)=2x-10. To find the inverse function f^{-1}(x) do such steps:

1. Rewrite the function f(x) as

y=2x-10

2. Express x in terms of y:

y+10=2x\\ \\x=\dfrac{y}{2}+5

3. Change x into y and y into x:

y=\dfrac{x}{2}+5

Now, the inverse function is

f^{-1}(x)=\dfrac{x}{2}+5

7 0
3 years ago
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How does Roosevelt use appeals to convince the
Bad White [126]

Answer:

Roosevelt appeals to the logic of the audience by noting that the interests of the people are not considered in a one-party government.

Step-by-step explanation:

5 0
2 years ago
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Make the indicated trigonometric substitution in the given algebraic expression and simplify(x-25)/x = Sin y0
Strike441 [17]

Answer:

x = 25 /(1 − sin(y )) and y ≠ π/2  +2πn

Step-by-step explanation:

Let's solve and simplify for x,

(x − 25 )/ x  = sin(y)

Let's multiply both sides by x

((x − 25 )/x) *x= sin(y)*x

Then,

x − 25 = sin(y) * x

Let's add 25 to both sides

x − 25 + 25 = sin(y) * x + 25

If simplify again,

x = sin(y) * x + 25

Then we need subtract sin y x from both sides

x − sin(y) * x = sin (y)* x + 25 − sin (y)* x

It will equal:

x − sin (y)* x = 25

Factor x−sin(y) x: x(1−sin(y) ), then we get:

x (1 − sin(y)) = 25

Finally we need divide both sides by 1 − sin(y) ; y ≠π /2 + 2πn

And it will give us this equation:

x = 25 /(1 − sin(y )) and y ≠ π/2  +2πn

3 0
3 years ago
Consider a circle whose equation is x2 + y2 + 4x - 6y - 36 = 0. Which statements are true? Check all that apply.
Vlada [557]

Answer:

The answer is B and C

Step-by-step explanation:

7 0
2 years ago
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What's the distance between theses two. (-5, 1) (2, 4)
ludmilkaskok [199]

Answer: squareroot of 58

You can solve this problem simply by using the <u>distance formula .</u> Using the distance formula we can solve this problem by just placing the numbers and then solving the equation.

6 0
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