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iragen [17]
3 years ago
11

Simplify the product 3 sqrt 7 (1- sqrt 7)

Mathematics
1 answer:
Dvinal [7]3 years ago
6 0
3\sqrt7(1-\sqrt7)=3\sqrt7\cdot1-3\sqrt7\cdot\sqrt7=3\sqrt7-3\cdot7=3\sqrt7-21

Used:\ \sqrt{a}\cdot\sqrt{a}=a
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Solve the following system of equations.
Elan Coil [88]

Answer:

(2,-3)

Step-by-step explanation:

I am not sure if you meant the first equation to be y or -y.  I solved it as y.

y = x-5                       -x -3y =7

I am going to take the second equation and write it as x =

-x - 3y = 7  Give equation

-x = 3y +7   Add 3y to both sides

x = -3y-7  Multiplied each term in the equation by -1 so that x could be positive

I am going to substitute -3y-7 for x in the first equation up above

y = x - 5

y = -3y -7 - 5  Substitute -3y-7 for x

y = -3y -12  Combined -7-5

4y = -12  Added 3y to both sides

y = -3  Divided both sides by 4.

I now know that y is -3, I will plug that into x = -3y-7 to solve for x

x = -3(-3) -7

x = 9-7   A negative times a negative is a positive

x = 2

5 0
2 years ago
In the number 57.117 the 1
Romashka [77]
The value of the one is 0.1 and 0.01.

Hope this helps :D
3 0
3 years ago
Jenny has saved $600 from her summer job. During the school year, she withdraws $20 from her account every week for her daily ex
11Alexandr11 [23.1K]
600 - 20w > 300
-20w > 300 - 600
-20w > - 300
20w < 300
w < 300/20
w < 15

Therefore, Jenny can withdraw $20 from her account for 14 weeks
7 0
3 years ago
Read 2 more answers
This net will be folded to form a prism. A net of a rectangular prism. From top to bottom, the rectangles are labeled B, D, E, F
Oksi-84 [34.3K]

Answer:

D and F

A and C

B and E

Step-by-step explanation:

due to the fact that it is a rectangle prism, and the A is on the left  and  C is on the right, the other alphabet  B,D,E F is straight down, you have to fold the d and f first, then A and C and lastly B and E to form the prism

5 0
3 years ago
Explain how u can find 3×584 using expanded form
stepladder [879]

You can solve it as 3*500+3*80+3*4. It the same as solving it normally, since you're essentially solving it as above (one place value at a time).

8 0
4 years ago
Read 2 more answers
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