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Reil [10]
3 years ago
14

Given the function f(x)=3+1/8x find a formula for the inverse function

Mathematics
1 answer:
Goshia [24]3 years ago
5 0
F-1(x) = 8x - 24

You can get this by switching the x and f(x) and then solving for f(x) 

f(x) = 3 + 1/8x ---> now switch them
x = 3 + 1/8f(x) ---> now subtract 3 from both sides
x - 3 = 1/8f(x) ---> now multiply both sides by 8
8x - 24 = f(x) ----> ANSWER
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Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

6 0
4 years ago
A paper cup shaped like a cone has a diameter of 6 centimeters and a slant height of 7.5 centimeters. About how much paper is ne
liq [111]

Answer:

22.5 cm^2

Step-by-step explanation:

Amount of paper is going to be measured in area, so we want the surface area of the cone.  Since it is a cub it doesn't have a base, so we don't need to count it.  

Area of the cone without the base, or what is called the lateral area is pi*r*s where r is the radius and s is the slant height.  and of course radius is d/2 where d is the diameter.  so let's plug it in.  We know diameter is 6 and slant height is 7.5

SA = pi * r * s

SA = pi * d/2 * s

SA = pi * 6/2 * 7.5

SA = 22.5 cm^2

So you will need 22.5 square centimeters of paper.

4 0
2 years ago
Sophia spent 6,274 rand on her trip. she exchanged the rand she had left for u.s. Dollars. The exchange rate was 1 rand to$0.14.
vaieri [72.5K]
6274 Rand = $878.36 US dollars The exchange was 1 Rand for $0.14 US dollars so all you have to do is multiply 6274 by 0.14.
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3 years ago
Read 2 more answers
If a small bag of Caramel Bliss weighs 12 ounces and an 8 week old kitten weighs 1.5 pounds, then how many kittens does it take
Minchanka [31]
8 kittens, 1.5×8 = 12
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Xavier downloaded songs to his ITunes library and spent $18.81. If each song costs $0.99, how many songs did he download?
ki77a [65]

Answer:

19 songs

Step-by-step explanation: 0.99 x 19 = 18.81

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