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2 years ago

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William bought pencil boxes for his art class. Each box costs $3.50. He gave $30 to the cashier and got $5.50 as change. How man

y pencil boxes did he buy?
A. 3

B. 4

C. 7

D. 10

Help It's for benchmark testing so I need it now!! D:

1 answer:

mr_godi [17]2 years ago

8 0

Answer:

D

Step-by-step explanation:

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Simplify this equation <br> Thanks a lot!!!

den301095 [7]

Answer:

-1

Step-by-step explanation:

We need to simplify the given expression . The given expression is ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

Here we can see that the power of the both exponent is same that is (2n+1) . Recall the property of exponents ,

$\bf\implies a^m \times b^m = (ab)^m$

Using this property , we have ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

This can be written as ,

$\rm\implies\{( 2 \sqrt6 +5) ( 2\sqrt6 - 5)\}^{2n-1}$

Simplifying using ( a+b)(a-b) = a² - b² ,

$\rm\implies\{( 2 \sqrt6)^2 -5^2 \}^{2n-1}\\\\\rm\implies ( 24 - 25)^{2n-1}$

Subtracting the numbers inside the brackets ,

$\rm\implies (-1)^{2n - 1 }$

Now we know that every odd number is in the form of 2n -1 , where n is any integer. Therefore , the <u>power is odd</u> .

Since the base is (-1) , for even power it is 1 and for odd power it is -1 . Therefore the final answer is ,

$\rm\implies\boxed{\quad \red{ -1 }\quad }$

<u>Hence </u><u>the</u><u> </u><u>required</u><u> answer</u><u> is</u><u> </u><u>(</u><u>-</u><u>1</u><u>)</u><u> </u><u>.</u>

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2 years ago

action bar. John has $132.55 in his bank account. He wants to join a guitar class that charges a $15 fee every week. John plans

Artemon [7]

$132.55-($15*12)=$132.55-$180=$-47.45
So then he would have owed 47.45 dollars!

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2 years ago

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An angle measures 87.8° less than the measure of a supplementary angle. What is the measure of each angle?

Lady_Fox [76]

The supplementary angle would be 180 degrees, and the other angle would be 92.2 degrees

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2 years ago

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PLEASE HELP ME THIS IS DUE ON MONDAY!!

VLD [36.1K]

1. First do 18,000 times .20 to get 3,600. Next minus 18,000 by 3,600 and you get $14,400 which is the answer.

2. First do 125 times .15 to get 18.75. Next minus 125 minus 18.75 to get 106.25. Then you do 106.25 times .05 to get 5.31. Finally, add 5.31 to to 106.25 and you get $111.56.

3. 17/39 as a decimal is .4358

4. First you do 45 times .06 to get 2.7. Finally you add 2.7 back onto 45 to get $47.7

5. true (i’m 99% sure on this question)

hope dis helped

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2 years ago

0.6 of it is 30<br> Find the number

lesya [120]

Answer:

The number is 50.

Step-by-step explanation:

0.6x=30

x=30/0.6

x=50

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3 years ago