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Oksi-84 [34.3K]
3 years ago
7

Hi :((( please help me solve questions 2 and 3 (the image below)

Mathematics
1 answer:
Marianna [84]3 years ago
8 0

Answer:

See below

Step-by-step explanation:

Question 2:

A relation is a function if every different x-value has a y-value. Since this relation has two outputs for x = 4 (1 and 9), it is NOT a function.

Question 3:

Plug the three points listed (-1, 0, 1) into the function and get their outputs. This will be the range.

f(x) = 2x + 4

Plug in -1.

f(-1) = 2(-1) + 4

f(-1) = -2 + 4

f(-1) = 2

f(x) = 2x + 4

Plug in 0.

f(0) = 2(0) + 4

f(0) = 4

f(x) = 2x + 4

Plug in 1.

f(1) = 2(1) + 4

f(1) = 2 + 4

f(1) = 6

This makes the range {2, 4, 6}.

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Answer:

1) <em><u>26.</u></em><em><u>1</u></em><em><u>% increase</u></em>

2) <em><u>20% decrease</u></em>

Work:

1)

-subtract the larger # from the smaller # to figure out what the change was.

8.8 - 6.5 = 2.3

-divide 2.3 by the orriginal ammount (8.8) to find your answer as a decimal

2.3 \div 8.8 = 0.261

-take 0.261 and multiply it by 100 to have your answer as a percent

0.2614 \times 100 = 26.1

-if the original number increased than it is percent increase and if the original number decreased than it is percent decrease

2)

-subtract the larger # from the smaller # to figure out what the change was.

15 - 12 = 3

-divide 2.3 by the orriginal ammount (15) to find your answer as a decimal

3 \div 15 = 0.2

-take 0.2 and multiply it by 100 to have your answer as a percent

0.2 \times 100 = 20

-if the original number increased than it is percent increase and if the original number decreased than it is percent decrease

8 0
3 years ago
Meredith rented a bike from Bubba’s Bike Shack. They charged $2 per hour. Meredith paid $26. Which equation could be used to fin
kakasveta [241]

Answer:

he will get 13 hours with the bike

Step-by-step explanation:

26 divided by 2 = 13.

3 0
3 years ago
The product of two Integers with different signs is...
swat32
The product of two integers of opposite signs equal to the additive inverse of the product of their absolute values. This, to find the product of a positive and a negative integer we find the product of their absolute values and assign minus sign to the product.
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Alex buys a home for $276,400. His home is predicted to increase in value 3.5% each year.
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Find f(-6)<br> f(x) = 2^x
Korvikt [17]

Answer:

f(-6) = 1/64

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Functions
  • Function Notation
  • Exponential Rule [Rewrite]:                                                                              \displaystyle b^{-m} = \frac{1}{b^m}

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 2ˣ

f(-6) is x = -6 for function f(x)

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em> [Function]:                                                                                f(-6) = 2⁻⁶
  2. Exponential Rule - Rewrite:                                                                               f(-6) = 1/2⁶
  3. Exponents:                                                                                                         f(-6) = 1/64
6 0
3 years ago
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