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3 years ago

What is y = 4x^2 - 2x - 8 in function notation

Mathematics

2 answers:

jeka57 [31]3 years ago

7 0

Answer written clearly above! Function notation is simply switching y to f(x).

Free_Kalibri [48]3 years ago

7 0

This is the answer
..........
If I understand the question

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If f(x) = 2x2 + 3x and g(x) = x – 2, what is (f + g)(2)?

goblinko [34]

For this case we have the following functions:
$f(x) = 2x^2 + 3x

g(x) = x - 2$
The first thing we must do is calculate the sum of functions or equivalently:
$(f + g)(x) = f(x) + g(x)
$
We have then:
$(f + g)(x) = (2x^2 + 3x) + (x - 2)
$
To complete the sum, we must add the terms whose exponents are equal.
We have then:
$(f + g)(x) = 2x^2 + (3x + x) - 2

(f + g)(x) = 2x^2 + 4x - 2$
Then, we evaluate the function for x = 2:
$(f + g)(2) = 2(2)^2 + 4(2) - 2
$
Rewriting we have:
$(f + g)(2) = 2(4) + 4(2) - 2

(f + g)(2) = 8 + 8 - 2

(f + g)(2) = 14$
Answer:
$(f + g)(2) = 14
$

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3 years ago

Ivan needs to memorize words on a vocabulary list for French class. He has memorized 24 of the words, which is two-thirds of the

Firdavs [7]

Answer:

36 words on the list.

Step-by-step explanation:

24/2 equals 12. 12 times 3 equals 36

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3 years ago

A researcher testing seed varieties for tulips got a confidence interval of (14.2%,17.4%) for the percent of seeds that can grow

Alex73 [517]

Answer:

The sample proportion is 0.158.

Step-by-step explanation:

In a confidence interval of proportions, we have the lower bound and the upper bound of the interval. The sample proportion is the halfway points between these bounds, that is, the sum of these bounds divided by 2.

In this problem, we have that:

Lower bound: 0.142

Upper bound: 0.174

Sample proportion: (0.142+0.174)/2 = 0.158

The sample proportion is 0.158.

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4 years ago

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Answer:

after the ballon fight it would be 12:45 pm

after they sprayed themselves with water it would be 1 :40 pm

1 : 40 pm is when alana's dad showed up

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3 years ago

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