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bixtya [17]
3 years ago
8

Factor f(x) = 4x^2 − 5x − 21

Mathematics
1 answer:
jeka943 years ago
4 0

Answer:

x = -7/4, 3

Step-by-step explanation:

Use quadratic formula

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answer is 1000 9000 and 1!

Step-by-step explanation:

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You believe that eating an apple a day is healthy and want to design an experiment to find out. You have available 40 volunteers
Gwar [14]

The best design for this experiment would be a repeated measures design. This is ideal to determine if eating an apple makes you healthy.

<h3>What is an experimental design?</h3>

An experimental design refers to the general structure of an experiment including how people are distributed into the control and experimental group to test a specific phenomenon.

<h3>What is a repeated measures design?</h3>

In a repeated measures design all participants are both parts of the control group, in this case, people who do not eat apples, and the experimental group, or people who eat apples.

<h3>What does this design imply?</h3>

In the case of determining if eating an apple every day, this design implies:

  • All participants will be asked to not eat apples every day for a specific period such as one or two months, and health levels will be measured during this time.
  • After the first step, all participants will be asked to eat an apple every day during the period, and their health will be measured.
  • The researcher can compare the results of each participant, which is more accurate than comparing one participant to another.

Learn more about experiments in: brainly.com/question/1452319

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Answer:

The answer is 2

Step-by-step explanation:

8 0
3 years ago
The difference of a number and nine is three. Find the number.
larisa86 [58]

Answer:

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Step-by-step explaimation:

Let's say x is the number we are trying to find.

9 = 3*(x-2)

9 = 3x -6

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Please leave a heart and a thanks!

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