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katrin [286]
1 year ago
7

Numbers and Operations KA 8th grade- correct answers only ty, and have a great day folks (7 pts)

Mathematics
2 answers:
Morgarella [4.7K]1 year ago
4 0

Answer:

it's c

Step-by-step explanation:

khan academy

nalin [4]1 year ago
3 0

Answer:c

Step-by-step explanation:

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Determine between which two integers the following irrational number lie square root 4 square root 21​
Taya2010 [7]

Answer:

25

Step-by-step explanation:

that what i got

6 0
2 years ago
What is the average rate of change of f over the interval [3,4]?
masya89 [10]

Answer:

4

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [ a, b ] = [ 3, 4 ] , then

f(b) = f(4) = - 1 ← from table

f(a) = f(3) = - 5 ← from table , then

average rate of change = \frac{-1-(-5)}{4-3} = \frac{-1+5}{1} = 4

3 0
3 years ago
Solve. Write the solution in interval notation. -2x>-8 and -5x<20.
Novosadov [1.4K]

Answer:

The interval notation of the solution is (-4 , 4)

Step-by-step explanation:

* Let us explain a very important point in solving inequality

- When you multiply or divide an inequality by negative number we

   must reverse the symbol of the inequality

- Ex:

∵ 2 < 3

- If we multiply the both sides of the inequality by -1, then the

  inequality will be -2 < -3 and this is completely wrong, so we must

  reverse the symbol of the inequality

∴ -2 > -3

* Now let us solve the problem

∵ -2x > -8

- Divide both sides by -2 and remember to reverse the symbol of the

  inequality

∴ x < 4

∵ -5x < 20

- Divide both sides by -5 and remember to reverse the symbol of the

  inequality

∴ x > -4

- From both solutions

∴ -4 < x < 4

∴ The solution is {x : -4 < x < 4}

- Interval notation is a way of writing the solutions of inequalities

 ( , ) if x does not equal the end numbers

 [ , ] if x equals the end numbers

 [ , ) , ( , ] if x equals one of the two end numbers

* The interval notation of the solution is (-4 , 4)

4 0
3 years ago
4x + 1 = 5, find x assuming x is a whole number​
levacccp [35]

Answer:

x=1

Step-by-step explanation:

4x+1=5

4x=5-1

4x=4

x=4/4=1

This happens to be a whole number.

4 0
3 years ago
Functions W and Z are both linear functions of x. Which statement comparing the functions is true?
Tpy6a [65]

Answer is in the file below

tinyurl.com/wpazsebu

8 0
3 years ago
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