All categories

2 years ago

Use words and math to explain why these two expressions are equivalent.

Mathematics

2 answers:

mote1985 [20]2 years ago

8 0

Answer:

See explanation

Step-by-step explanation:

Let’s manipulate 3h+2-6+5h to show how it is equal to 2(4h-2)

Combine like-terms:

3h+2-6+5h = 8h-4

Then, factor out the greatest common factor (in this case it’s 2):

8h-4 = 2(4h-2)

If you want to verify how to above is true, just combine them again!

Sunny_sXe [5.5K]2 years ago

5 0

Answer:

here

Step-by-step explanation:

when given the first set, you combine like terms so you add 5h and 3h together and -6 and 2 are combined, so the first one is 8h -4. The second set you distribute 2 to 4h and -2 getting you 8h and -4 as well

You might be interested in

PLEASE HELP IN ALGEBRA

Aleksandr [31]

Sound, earthquakes, the brightness of stars, and chemistry, such as pH balance, a measure of acidity and alkalinity, are all instances of this.

7 0

2 years ago

Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have m

valina [46]

Answer:

Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population $\mu=600$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

$\mu=600$ represent the population mean for the Graduate Record Exam (GRE)

$\sigma=25$ represent the population standard deviation for Graduate Record Exam (GRE)

2) Solution to the problem

Let X the random variable that represent the Graduate Record Exam (GRE) of a population, and for this case we know the distribution for X is given by:

$X \sim N(600,25)$

Where $\mu=600$ and $\sigma=25$

We want to find the z score for a score of 550. And in order to do this we need to apply the formula for the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$z=\frac{550-600}{25}=-2$

So the answer for our case would be Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population $\mu=600$

7 0

2 years ago

What is the minimum value of the cube root parent function on -8≤x≤8?

podryga [215]

Minimum means smallest, so what is the smallest number possible for this set?

-8

---

hope it helps

6 0

2 years ago

18. A glasscutter needs to cut rectangular pieces of

ololo11 [35]

For the cut glass pieces to be rectangular in shape, the glass cutter should ensure:

All four interior angles = 90° each.
Opposite sides are parallel and equal to each other.
Diagonals should be of the same length and should bisect each other.

<h3>Properties of a Rectangle</h3>

All four angles of a rectangle are 90° each.
There are two pairs of parallel sides that are equal in length.
The diagonals bisect each other and are of equal length.

Thus, to ensure the cut glass pieces are rectangular in shape, he should ensure the following:

Make the four interior angles 90° each.
The opposite sides should be parallel and equal to each other.
The diagonals should be of the same length and should bisect each other.

Learn more about properties of rectangle on:

brainly.com/question/2835318

4 0

2 years ago

This diagram shows a sector of a circle radius 11cm

denis-greek [22]

Step-by-step explanation:

first you have to use the formula for circle is 2πr

π= ----

and r stands for radius

5 0

1 year ago