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MatroZZZ [7]
3 years ago
11

What are 3 completed examples for functions?

Mathematics
1 answer:
Lyrx [107]3 years ago
3 0
Example 1

Write y = x2 + 4x + 1 using function notation and evaluate the function at x = 3.

Solution

Given, y = x2 + 4x + 1

By applying function notation, we get

f(x) = x2 + 4x + 1

Evaluation:


Substitute x with 3

f (3) = 32 + 4 × 3 + 1 = 9 + 12 + 1 = 22

Example 2

Evaluate the function f(x) = 3(2x+1) when x = 4.

Solution

Plug x = 4 in the function f(x).

f (4) = 3[2(4) + 1]

f (4) = 3[8 + 1]

f (4) = 3 x 9

f (4) = 27

Example 3

Write the function y = 2x2 + 4x – 3 in function notation and find f (2a + 3).

Solution

y = 2x2 + 4x – 3 ⟹ f (x) = 2x2 + 4x – 3


Substitute x with (2a + 3).

f (2a + 3) = 2(2a + 3)2 + 4(2a + 3) – 3

= 2(4a2 + 12a + 9) + 8a + 12 – 3
= 8a2 + 24a + 18 + 8a + 12 – 3
= 8a2 + 32a + 27
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Help me, please. Please also explain to me why you picked your answer.
Shkiper50 [21]

Answer: Lower left corner  \frac{29}{18+29} \times 100

We have 29 people who chose fishing out of 18+29 people who filled out the survey. We don't use 60 because not everyone filled out the survey, and we're only focusing on survey participants. The "times 100" at the end will move the decimal point 2 spots to the right, and convert it to percent form.

For example, if you had 2 people who liked fishing out of 8 total then 2/8 = 0.25 = 25% of the people like fishing.

4 0
3 years ago
Read 2 more answers
A bag is filled with 200 silver coins and 123 gold coins. What is the theoretical probability of not pulling out a silver coin
Simora [160]
62% because 200 silver coins out of 323 (total of all coins) is .619..., resulting in 62%
4 0
3 years ago
Write the equation of the line PARALLEL to the line y = 4x - 9 that passes through the
german

Answer:

y = 4x + 12

Step-by-step explanation:

The slope of the line y = 4x - 9 is 4.

The slope of the line we are looking for is also 4.

y - y1 = m(x - x1)

y - 4 = 4[x - (-2)]

y - 4 = 4(x + 2)

y - 4 = 4x + 8

y = 4x + 12

Answer: y = 4x + 12

6 0
3 years ago
Read 2 more answers
Helppp me understand plssss
hram777 [196]
Convert the mixed number into improper fraction:
-\frac{\frac{8}{5}}{-\frac{2}{3}}

Multiply by reciprocal:
-\left(-\frac{24}{10}\right)
-\frac{1\frac{3}{5}}{-\frac{2}{3}}

\frac{12}{5}

Convert improper fraction to mixed number
2\frac{2}{5}
8 0
3 years ago
PLZZZZZ NEED HELP!!!!!!
Alisiya [41]
Answer is C. multiply by 3 - square root 5

using a^2 - b^2 = (a + b)(a - b)
4 0
3 years ago
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