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Readme [11.4K]
3 years ago
8

Simplify the following algebraic expression -9-10[7x-3(3+10x)]

Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0
<span>-9 -10[7x -3(3 + 10x)]

= -9 - 10(7x - 9 - 30x)

= -9  - 10( -23x - 9)

= -9 + 230x + 90

= 230x + 81

Answer: </span>230x + 81<span>

</span>
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Tina paid $6.60 for some $0.15 stamps and some $0.20 stamps. She bought 37 stamps in all. How many of each kind did she buy?
sergiy2304 [10]

Answer:

Let n be the number of 25 cent stamps.Then, 28 - n must be the number of 29 cent stamps.Tim paid $7.60 the stamps.

0.25n + 0.29(28 - n) = 7.60

This means that n stamps at 25 cents a piece plus (28 - n) stamps at 29 cents a piece sum to $7.60.Solve for m.

0.25n + 8.12 - 0.29n = 7.60

-0.04n = -0.52

n = 13

So, Tim bought 13 25-cent stamps and 28 - 13 = 15 29-cent stamps

Step-by-step explanation:

hope this helps:)

4 0
2 years ago
Find the median of the data.<br><br> 12, 10, 14, 9, 8, 9, 15, 15
hram777 [196]

Answer:

11

Step-by-step explanation:

First, order the numbers in the given set from least to greatest:

8 , 9 , 9 , 10 , 12 , 14 , 15 , 15

The median is the number found in the middle of the given set. If the amount of numbers in the set are even (as in this case), then you will find the mean of the two middle numbers.

In this case, the middle numbers are 10 & 12:

Find the mean. The mean is found by adding all the numbers together and dividing by the amount of numbers there is:

(10 + 12)/2 = (22)/2 = 11

11 is your median.

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5 0
2 years ago
Read 2 more answers
For Jane Jones is a single person with 2 exemptions. In a week she earns $212.12. Using the chart above, Jane's federal income t
SpyIntel [72]

Answer:

The other answer is INCORRECT the CORRECT answer is : 34.00

Step-by-step explanation:

In the chart it shows how much for the number of exemptions. The other answer only included one but the question asks for TWO. Therefore making it 34.00

6 0
3 years ago
3/4 x 10 = ? <br> thank you!!!
lesantik [10]
3/4 *10 is 7.5. 0.75 * 10 = 7.5 
4 0
3 years ago
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if 1/2 an apple was shared equally among 3 people. what fracton of the who apple did each person recive.
enyata [817]

Answer:

1/6

Step-by-step explanation:

1/2/3 is a sixth of an apple that all 3 people equally shared.

3 0
3 years ago
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