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NeX [460]
3 years ago
10

3.simplifyyyyyyyyyyyyyyyyyyy

Mathematics
2 answers:
Charra [1.4K]3 years ago
4 0

Answer:

C. 7

Step-by-step explanation:

garik1379 [7]3 years ago
4 0

Answer:

(3+√2)(3-√2) =  7

Step-by-step explanation:

We have given a expression.

(3+√2)(3-√2)

We have to simplify above expression.

We use difference formula to solve above expression.

(a-b)(a+b) =   a²-b²

(3+√2)(3-√2) =  (3)²-(√2)²

(3+√2)(3-√2) =  9-2

(3+√2)(3-√2) =  7 which is the answer.

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Read the following paragraph. How does sentence 4 develop the main idea of the paragraph?
saul85 [17]

Answer:

This sentence shows Elion's determination and commitment to learn.

Step-by-step explanation:

During this time she also took classes at New York University, where she earned a master's degree in 1941.

3 0
4 years ago
Add or subtract the linear expressions and simplify:
mash [69]
The answer should be 2x-2
4 0
3 years ago
Keep gettin this one wrong please help
Diano4ka-milaya [45]

Answer:

30 Nickels and 188 Pennies

Step-by-step explanation:

okay, so to set up the equation first, we have to assign each coin a variable, let's call them p and n:

P= number of pennies

N= number of nickels

the value of a penny is 1 cent, so 1P, and the value of a nickel is 5 cents, so 5N

The problem states that he has 218 coins, meaning that the total number of pennies and nickels adds up to 218:

P + N = 218

the total value of the coins is $3.38, so that would mean that 1P + 5N has to equal $3.38:

1P + 5N = 338

Okay, so now that we have our equations let's solve them using elimination:

we have to get a common coefficient between both equations, so let's multiply our first equation by 5:

P x 5 = 5P

N x 5 = 5N

218 x 5 = 1090

so, now we can solve by elimination:

5P + 5N = 1090

1P + 5N = 338

the N's cancel out:

4P = 752

divide both sides by 4:

P = 188

okay, so if theres a total of 218 coins, subtract 188 from 218:

218 - 188 = 30

so, there are 30 nickels and 188 pennies.

check our work:

5 x 30 = 150

1 × 188 = 188

150 + 188 = 338

338 = 338

I hope this helps! :)

5 0
4 years ago
Bridget needs an actor actor is offering her services for initial $250 in addition to $40 per day actor beers offering her servi
Neporo4naja [7]

Answer:it will take 9 days for both actors to charge the same amount.

Step-by-step explanation:

Let x represent the number of days it will take the cost of hiring either actor A or actor B to be the same.

Let y represent the cost of hiring actor A for x days.

Let z represent the cost of hiring actor B for x days.

Actor A is offering her services for initial $250 in addition to $40 per day. It means that

y = 250 + 40x

Actor B is offering her services for an initial $160 in addition to $50 per day. It means that

z = 160 + 50x

To determined the number of days when both costs would be the same, we would equate equation y to equation z. It becomes

250 + 40x = 160 + 50x

50x - 40x = 250 - 160

10x = 90

x = 90/10 = 9

4 0
3 years ago
If f(x) = 2x − x² + 3, find f(x − 4).
belka [17]

Answer:

−x^2+10x−21

Step-by-step explanation:

Hope this helped you! If this is wrong, please tell me and have a good day!

7 0
2 years ago
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