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otez555 [7]
3 years ago
15

I really need help thia is my last chance to get a good grade in math-​

Mathematics
1 answer:
romanna [79]3 years ago
8 0

Answer:

Step-by-step explanation:

bsahaahaaana

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Your hotdogs currently have a menu price of $2.80 + $.10 for extra sauerkraut. You want to include the sauerkraut in the cost an
jasenka [17]

Answer:

C) $3.77

Step-by-step explanation:

  • $2.80 + $0.10 = $2.90

  • Turn 30% into 0.30 by moving the decimal point (percentage sign) 2 places to the left.

  • To solve 30% of $2.90  →   0.30 x 2.90 = 0.87

  • Finally  $2.90 + $0.87 = $3.77
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3 years ago
What is the inverse of the function f(x) = 2x + 1?
Luda [366]

Answer:

f^{-1}(x)=\frac{1}{2}x-\frac{1}{2} ⇒ answer 1

Step-by-step explanation:

* Lets explain how to find the inverse of a function

- To find the inverse of a function :

# Write y = f(x)

# Switch the x and y

# Solve to find the new y

# The new y is f^{-1}

* Lets solve the problem

∵ f(x) = 2x + 1

- Put y = f(x)

∴ y = 2x + 1

- Switch x and y

∴ x = 2y + 1

- Solve to find the new y

∵ x = 2y + 1

- Subtract 1 from both sides

∴ x - 1 = 2y

- Divide both sides by 2

∴ (x - 1)/2 = y

- Divide each term in the left hand side by 2

∴ y = 1/2 x - 1/2

- Replace y by f^{-1}

∴ f^{-1}(x)=\frac{1}{2}x-\frac{1}{2}

* The inverse of the function is f^{-1}(x)=\frac{1}{2}x-\frac{1}{2}

7 0
3 years ago
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Old Faithful in Yellowstone National Park has a predictable eruption time. The park
prisoha [69]

Answer:How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

Step-by-step explanation:

How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

5 0
2 years ago
I need help on these please help me smart people
Liula [17]
Help with what? there is nothing on this page for me to help u with .
7 0
3 years ago
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S is the set of prime numbers that are less than 15
xenn [34]

The answer is A. It is not B because 9 is the product of 3 x 3. It can't be C because 1 is only the product of 1 x 1.

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