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Usimov [2.4K]
3 years ago
7

X^4+2x^2-4=0 What does x equal

Mathematics
1 answer:
Agata [3.3K]3 years ago
8 0

Answer:

x=−1.111786,1.111786

Step-by-step explanation:


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Across which Axis was point H reflected?
Vedmedyk [2.9K]

Answer:

X - axis

Step-by-step explanation:

H(9, - 1) \rightarrow H'(9, 1)

Since in the above reflection x coordinate remains the same and y-coordinate changes from 1 to - 1, hence point H is reflecting across X - axis.

4 0
3 years ago
I’ll make you brainlist thankss
dusya [7]

Answer:

The equation of the line will be:

  • y = 0

Step-by-step explanation:

Given the points

  • (0, 0)
  • (3, 0)

Finding the slope

\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(0,\:0\right),\:\left(x_2,\:y_2\right)=\left(3,\:0\right)

m=\frac{0-0}{3-0}

m=0

We know that the value of y-intercept can be obtained by setting x=0, and solving for y

Here,

at x = 0, the value of y = 0

Thus,

y-intercept = b = 0

We know the slope-intercept form of the line equation is

y=mx+b

where m is the slope and b is the y-intercept

now substituting m = 0 and b = 0 in the slope-intercept form

y = mx+b

y = 0(x) + (0)

y = 0+0

y = 0

Therefore, the equation of line will be:

  • y = 0
8 0
3 years ago
According to records in a large hospital, the birth weights of newborns have a symmetric and bell-shaped relative frequency dist
Kamila [148]

Answer:

15.9% of babies are born with birth weight under 6.3 pounds.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 6.8 pounds

Standard Deviation, σ = 0.5

We are given that the distribution of  birth weights is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(birth weight under 6.3 pounds)

P(x < 6.3)

P( x < 6.3) = P( z < \displaystyle\frac{6.3 - 6.8}{0.5}) = P(z < -1)

Calculation the value from standard normal z table, we have,  

P(x < -1) = 0.159 = 15.9\%

15.9% of babies are born with birth weight under 6.3 pounds.

8 0
3 years ago
The length of a rectangle is 5t+6 and its height is t^6 , where t is time in seconds and the dimensions are in inches. Find the
Nataly_w [17]
\bf \textit{area of a rectangle}\\\\&#10;A=l\cdot w\qquad &#10;\begin{cases}&#10;l=length\\&#10;w=width\\&#10;-----\\&#10;l=5t+6\\&#10;w=t^6&#10;\end{cases}\implies A(t)=(5t+6)t^6&#10;\\\\\\&#10;A(t)=5t^7+6t^6\implies \cfrac{dA}{dt}=35t^6+36t^5
7 0
3 years ago
4^3 + (-2) ^4 = ? <br> evaluate?
kirill115 [55]

Answer:

80

Step-by-step explanation:

PEMDAS- do exponents first here, simplifying that to 64+16, add those to get 80.

4 0
3 years ago
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