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Gnom [1K]
2 years ago
10

Help with math plssssss!

Mathematics
1 answer:
Olenka [21]2 years ago
6 0

\dfrac{x\sqrt3}{\sqrt{4x}}=\dfrac{x\sqrt3}{\sqrt4\cdot\sqrt{x}}=\dfrac{x\sqrt3}{2\sqrt{x}}=\dfrac{x\sqrt3\cdot\sqrt{x}}{2\sqrt{x}\cdot\sqrt{x}}=\dfrac{x\sqrt{3x}}{2x}=\dfrac{\sqrt{3x}}{2}\to\boxed{4.}\\\\Used:\\\\\sqrt{ab}=\sqrt{a}\cdot\sqrt{b}\\\\\sqrt{a}\cdot\sqrt{a}=a

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Suppose the average price for new cars in 2012 has a mean of $30,100 and a standard deviation of $5,600. Based on this informati
KatRina [158]

Answer:

($13,300,$46,900)

Step-by-step explanation:

We are given the following in he question:

Mean, μ = $30,100

Standard Deviation, σ = $5,600

Chebyshev's Theorem:

  • According to  theorem atleast 1 - \dfrac{1}{k^2}  percent of data lies within 2 standard deviations of mean.
  • For k = 3,

1 -\dfrac{1}{(3)^2} = 0.889 \approx 89\%

Thus, 89% of data lies within three standard deviation of mean.

\mu - 3(\sigma) = 30100 - 3(5600) = 13300\\\mu + 3(\sigma) = 30100 + 3(5600) = 46900

Thus, we expect at least 89% of new car prices to fall within ($13,300,$46,900)

3 0
2 years ago
What is 2 times 2 2/5
Komok [63]

Answer:

4.8 or 4 4/5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
-3 x 2(4-18) + 8 =<br> Solve the equation
Karolina [17]

we are given

-3 x 2(4-18) + 8 =

Firstly , we will solve inside parenthesis

-3 *2(4-18) + 8 =

-3 *2*-14 + 8 =

now, we can multiply

-6*-14 + 8 =

84 + 8 =

=92............Answer

6 0
2 years ago
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How can systems of linear equations be used in real life?
TiliK225 [7]

Answer:

Almost any situation where there is an unknown quantity can be represented by a linear equation, like figuring out income over time, calculating mileage rates, or predicting profit. Many people use linear equations every day, even if they do the calculations in their head without drawing a line graph.

Step-by-step explanation:

Hope it is helpful....

4 0
3 years ago
Please help i will give brainliest!
iren [92.7K]
Area of square = 24cm²
⇒ Length = √24 

Find the diagonal of half the square:
a² + b² = c²
c² = (0.5√24)² + (√24)²
c² = 6 + 24
c² = 30
c = √30

The diagonal of half of the square is the radius of the circle.
⇒ radius = √30

Area of the semicircle = 1/2πr² = 1/2π(√30)² =15π

Answer: 15π²

5 0
3 years ago
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