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gogolik [260]
3 years ago
10

When evaluating the following expression, which should you do first? 45 ÷ (9 - 4)

Mathematics
2 answers:
xenn [34]3 years ago
7 0
Start with the parentheses 9-4=5

then bring down the 45 / 5= 9
Viefleur [7K]3 years ago
6 0
You should always do the parentheses first
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Sally wants to paint her kitchen. The area to be painted is 260 square feet. One quart of paint covers 90 square feet. How many
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260 divided by 90 is 2.8 and you would probably want to round that up so 3 quarts
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0.10x how much is the bill for a person who uses 600 kWh in a month
Yuliya22 [10]

The total bill paid for a person who uses 600 kWh in a month is $60.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Let us assume that the utility company charges $0.10 per kWh, hence:

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7 0
1 year ago
A collection of 5 positive integers has mean 4.4, unique mode 3 and median 4. If an 8 is added to the collection, what is the ne
Sphinxa [80]

9514 1404 393

Answer:

  4.5

Step-by-step explanation:

It appears the 5 integers must be {3, 3, 4, 5, 7}.

For the mode to be unique, there must be more than one '3', and there cannot be any other repeated numbers. For 4 to be the median, it must be the 3rd-highest number. Then the remaining numbers must be integers greater than 4 with a sum of 12 for the mean to be 4.4.

When 8 is added to the collection, the median is now the average of 4 and 5, so is 4.5.

The new median is 4.5.

_____

<em>Comment on vocabulary</em>

<u>mean</u>: the sum of numbers divided by the number of numbers. 5 numbers with a mean of 4.4 will have a sum of 5×4.4 = 22.

<u>median</u>: the middle number of a collection of an odd number of numbers, when sorted from lowest to highest. It is the 3rd number of a group of 5 numbers. When there are an even number of numbers in the group, the median is the average of the middle two in the sorted list. Here, that means the 3rd number in the list of 5 is '4'. When 8 is added, 4 becomes one of the numbers contributing to the average that will be the new median.

<u>mode</u>: the member of the group that appears the most times. When the mode is unique, it means there are no other numbers repeated as often. Here, we know the 3rd number (of 5) is 4, so there can only be two numbers '3' in the collection. That 3 is the unique mode means no other numbers are repeated at all.

8 0
3 years ago
10^6 in standard form
nalin [4]
1000000 is the answer
6 0
3 years ago
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2(x + 7) + 3x = 12<br> What is the first step in solving this equation for x?
yawa3891 [41]
First step is expand by using distributive property
<span>2(x + 7) + 3x = 12 

step 1:
2x + 14 + 3x = 12</span>
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3 years ago
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