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KiRa [710]
3 years ago
9

Which of the following words is defined as “the study of hearing”? audiology audiologist audiometer audio

Mathematics
1 answer:
elena55 [62]3 years ago
4 0
Audiology 100% hope this helps :)
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Consider this expression: 4(5x - 7y). Enter an expression that shows the difference of exactly two terms that is equivalent to 4
Eddi Din [679]

Answer:

First you do what is inside the parentheses. 10 x 5 - 3. 50 - 3 =47. Then you multiply 47 x 5 = 235.

Step-by-step explanation:

8 0
3 years ago
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How do you solve this?
puteri [66]

Answer:

Width: 7

Length: 14

Step-by-step explanation:

The area of a rectangle can be found my multiplying the length by the width. We do not know neither the length nor the width. However, we do know that the length is 7 feet longer than the width. Because we do not know the value of either side, let's let x represent the width.

Since the length is 7 feet longer, we can represent the length by x+7.

Now that we have our values for the length and the width we can multiply them together to find our area.

(x)(x+7)=x^{2} +7x

Now we have our equation, so we can address the changes made by the original question. The original question states that when 7 is added to both the length and width the area becomes 3 times larger. To do so simply increase each side by 7 by adding 7 to the original values.

(x+7)(x+14)

And multiply our area by 3.

3(x^{2} +7x)

set these equal to each other to find your new equation.

(x+7)(x+14)=3(x^{2} +7x)

Now you need to solve for x. To do this first muliply (x+7) and (x+14).

(x+7)(x+14)=\\x^{2} +14x+7x+98=\\x^{2} +21x+98

Then multiply 3(x^{2} +7x)

3(x^{2} +7x)=\\3x^{2} +21x

Now you can begin solving for x.

x^{2} +21x+98=3x^{2} +21x

Subtract x^{2} from both sides.

21x+98=2x^{2} +21x

Subtract 21x from both sides.

98=2x^{2}

Divide by 2.

49=x^{2}

And finally take the sqaure root of both sides.

\sqrt{x^{2} }=\sqrt{49}\\x=7

Remember, because we are dealing with length, there cannot be negative. So while normally we would get both +7 <em>and</em> -7, in this case we <em>only </em>get +7.

Now that we have the value of x, we can plug it into our original values.

For width we simply get 7.

For length we get 7+7=14

To check our answer we cna multiply 7 by 14 to get 98. Then we can add 7 to our length and width to get 14 and 21. Multiply these together and we get 294. 294 divided by 3 is 98, proving our answer correct.

7 0
3 years ago
There are 12 inches in a foot. Find the number of inches in 6 feet ​
Scrat [10]

Answer:

72 inches

Step-by-step explanation:

12 × 6 = 72

Answer: There are 72 inches in 6 feet

3 0
3 years ago
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What is a decimal in tenths that is less than 2.42 but greater than2.0
lukranit [14]
The decimal of 2.1 is greater than 2.0 but less than 2.42
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Lesley has $17 to spend, which she uses to buy a reference book. Write 2 points and solve an equation to show how much Lesley wi
Vikentia [17]

Answer:

LESLEY GETS ABSOLUTELY NOTHINGGGG

Step-by-step explanation:

6 0
2 years ago
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