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ddd [48]
3 years ago
10

Simplify. 5√7+√7-2√7 3√7 3√21 4√21 4√7

Mathematics
2 answers:
emmasim [6.3K]3 years ago
5 0
I hope this helps you



square root of 7. (5+1-2)


square root of 7.4


4.square root of 7
Hatshy [7]3 years ago
5 0

Answer: 4 sqrt 7

Step-by-step explanation:

He is correct, the answer is the one above.

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Last one could someone pls help me!
xxMikexx [17]
The answer would be no you can’t afford a repair that takes 4 hours because:
Since it’s 4 hours we multiply that by $40 because for each hour worked and they worked for 4 hours.
4*40= $160
And then we add $50 because the electric charges to make a house call.

So the Answer would be $210 when we add $160 and $50= 210
5 0
3 years ago
What is the domain of the function in this table?
Vedmedyk [2.9K]

Answer: Option A ( 2 ,3 ,4 ,5 ) is correct answer


Step-by-step explanation: Domain of a function is defined by the values obtained by x. The value of obtained by y is called the range of the function. Here values of x are 2, 3, 4 and 5. Values of y are 1,4,4,2.


Since domain is the values of x, hence domain of the function is 2,3,4,5


Hope it helps.


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8 0
3 years ago
Match each quadratic equation with its solution set.
Marianna [84]

Answer:

( 8 , - 8)  => x² - 55 = 9

( 4 , - 4)  =>  2x² - 32 = 0

(5 , - 5) => 4x² - 100 = 0

(11 , - 11) => x² - 140 = -19

( 3, - 3) =>  2x² - 18 = 0

Step-by-step explanation:

1)

2x^2  - 32 = 0\\\\2(x^2 - 16 ) = 0 \\\\x^2 - 16 = 0 \\\\x^2 = 16 \\\\x = \sqrt {16 }  = \pm 4

x = ( 4 , - 4)

2)

4x^2 - 100 = 0 \\\\4(x^2 - 25 ) = 0\\\\x^2 - 25 = 0 \\\\x^2 = 25 \\\\x= \sqrt{25} = \pm 5

x = ( 5 , - 5 )

3)

x^2 - 55 = 9 \\\\x^2 = 9 +55\\\\x^2 = 64\\\\x = \sqrt{64} = \pm 8

x= ( 8 , - 8)

4)

x^2 - 140 = - 19\\\\x^2 = -19 + 140 \\\\x^2 = 121 \\\\x= \sqrt{121} = \pm 11

x = ( 11  , -11)

5)

2x^2 - 18 = 0\\\\2(x^2 - 9) = 0\\\\x^2- 9 = 0 \\\\x^2 = 9 \\\\x = \sqrt9 = \pm 3

x = ( 3 , - 3)

8 0
3 years ago
Read 2 more answers
Which is a better deal: 10 pounds of hamburger for $4.99 or 5 pounds of hamburger for $2.69? PLEASE HELP ME QUICKLY ILL LOVE YOU
JulijaS [17]

Answer:

10 pounds for $4.99

Step-by-step explanation:

If you multiply the 5 pounds for 2.69 by 2, you would get 10 pounds of hamburger for 5.38 which is more than 4.99

7 0
3 years ago
Read 2 more answers
Claire earned $60 babysitting on Friday night. She spent 1/4 of it at the movie, 1/3 going out to dinner, and she saved the rest
In-s [12.5K]

Answer:

25 dollars

Step-by-step explanation:

1/4*60=15

1/3*60=20

20+15=35

60-35=25

6 0
3 years ago
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