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VashaNatasha [74]
3 years ago
12

Expand and simplify (3x-2)^2

Mathematics
1 answer:
nasty-shy [4]3 years ago
5 0
(3x - 2)^2  is the same as:

(3x - 2)(3x - 2)

use the FOIL method: First, Outside, Inside, Last

3x(3x) = 9x²
3x(-2) = -6x
-2(3x) = -6x
-2(-2) = 4

9x² - 6x - 6x + 4

Combine like terms

9x² (- 6x - 6x) + 4

9x² - 12x + 4 is your answer

hope this helps
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Are these ratios equivalent?
vaieri [72.5K]

Answer:

Yes

Step-by-step explanation:

3 medium cars to 1 small car can be made into a fraction like this: \frac{3}{1} or \frac{1}{3}. But you must be consistent if the denominator represents medium cars or small cars.

For this, I'm just going to make medium cars the numerator.

18 medium cars to 6 cars can be made into a fraction like this : \frac{18}{6}.

When you divide both fractions in a calculator (or in your head), you will realize that they both are the same value (equivalent).

\frac{3}{1}=\frac{18}{6} = 3

\frac{1}{3} = \frac{6}{18} = .3333333

These ratios are equivalent.

4 0
3 years ago
Joselyn saw an alligator that was 5 feet long. How many inches is 5 feet.
goldfiish [28.3K]

Answer:

The alligator is 60 Inches long.

Step-by-step explanation:

5 feet is 60 inches.

hope it helps!

7 0
3 years ago
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What is the answer to the question 2+2
Anarel [89]

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4

Step-by-step explanation:

2+2=4

7 0
3 years ago
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an airplane is traveling at a constant speed of 600 miles per hour. How many feet does it travel in 10 seconds? Remember that 1
frez [133]
<h2>Hello!</h2>

The answer is:

The airplane will travel 8800 feet in 10 seconds.

<h2>Why?</h2>

It's a conversion exercise, we need to be careful in order to solve it with no mistakes.

First:

We need to remember that 1 hour is equal to 60 minutes, and 1 minute is equal to 60 seconds, so, to calculate how many seconds are in one hour, we need to perform the following operation:

Time=1hour*\frac{60minutes}{1hour}*\frac{60seconds}{nminute}=3600seconds

Second:

We need to convert from miles to feet, we need to remember that 1 mil is equal to 5280 feet.

So, solving we have:

Speed=600\frac{miles}{hour}*\frac{1hour}{3600seconds}*\frac{5280ft}{1mile}=880\frac{ft}{seconds}

Now, calculating how many feet does it travel in 10 seconds, we have:

distance=speed*time\\\\distance=880\frac{ft}{seconds}*10seconds=8800ft

We have that the airplane will travel 8800 feet in 10 seconds.

Have a nice day!

7 0
3 years ago
Pleas choose correct answer
ElenaW [278]

Answer:

b

Step-by-step explanation:

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