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iren [92.7K]
4 years ago
5

Please help! Question in the picture below!! Will mark brainliest!

Mathematics
2 answers:
dangina [55]4 years ago
5 0

Hello from MrBillDoesMath!

Answer:

3 sqrt(70) - 6 sqrt(30)

Discussion:

3 sqrt(10)   ( sqrt(7) - 2 sqrt(3)) =

3 sqrt(10*7) - 6 sqrt(3*10) =

3 sqrt(70) - 6 sqrt(30)

Not sure if this is what they wanted

Thank you,

MrB

Nutka1998 [239]4 years ago
3 0

Answer:

Exact Form:

3 √7 0 − 6 √ 30

Decimal Form:

−

7.76355265 ...

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Solve n for the following preportion :<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B5%7D%20%20%3D%20%20%5Cfrac%7B12%
Gemiola [76]
N=20




3 times 4 is 12. Anything u multiple the top u multiple the bottom. So 5 times 4 is 2
5 0
4 years ago
2(3x+2)=2x+28<br><br> What is x?
kherson [118]

Answer:

x = 6

Step-by-step explanation:

<u>Step 1:  Distribute </u>

2(3x + 2) = 2x + 28

(2 * 3x) + (2 * 2) = 2x + 28

(6x) + (4) = 2x + 28

<u>Step 2:  Subtract 2x from both sides </u>

6x + 4 - 2x = 2x + 28 - 2x

4x + 4 = 28

<u>Step 3:  Subtract 4 from both sides </u>

4x + 4 - 4 = 28 - 4

4x = 24

<u>Step 4:  Divide both sides by 4 </u>

4x / 4 = 24 / 4

<em>x = 6 </em>

Answer:  x = 6

5 0
3 years ago
Darrin can skateboard 2 miles against a 4 mph wind in the same amount of time he skateboards 6 miles with a 4 mph wind. Find the
MA_775_DIABLO [31]

Answer:

Speed = 8mph

Step-by-step explanation:

Speed of wind = 4mph

Let speed of Darrin with no wind be "x" mph

then resultant speed of Darrin, travelling in direction of wind = (x + 4) mph

Using a result, Time = Distance travelled / Net speed

Time taken by Darrin to travel 6miles in direction of wind = 6 / (x + 4)

When Darrin travel in opposite direction of wind, then its net speed                                                  = (x - 4)mph

Darrin travel 2 miles against the wind in 6/(x + 4) hr

then   Distance =  speed ×  time

           2 =  ( x- 4 ) × ( 6/x + 4)

          2x + 8 = 6x - 24

            4x  =  32

              x = 8 mph

Therefore speed of Darrin skateboard with no wind = 8mph

                       

8 0
3 years ago
Read 2 more answers
What expression is equal to (3 x 5) x 4
umka21 [38]

Answer:

60

Step-by-step explanation:

Step 1:

3 x 5 = 15

Step 2:

15 x 4 = 60

5 0
3 years ago
Read 2 more answers
I'm having a hard time understanding these kinds of problems.
babymother [125]

A function associates x and y values. The graph of the function is formed by all the points (x,y) such that x and y are actually associated, i.e. y=f(x).

So, if you choose x=4, you can see that the correspondant point on the graph has a y coordinate that is somewhere between 3 and 4 - much closer to 4 actually.

So, an estimated value could be around 3.75

8 0
4 years ago
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