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2 years ago

What is the range of the function graphed below ?

Mathematics

2 answers:

Nuetrik [128]2 years ago

8 0

Answer:

Step-by-step explanation:

PilotLPTM [1.2K]2 years ago

7 0

Answer:

Step-by-step explanation:

I counted by recording all the numbers nd steps

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I could use some help doing this simple math problem lol.

alexira [117]

$D:k-9\geq 0 \wedge k\geq0\\
D:k\geq 9 \wedge k\geq0\\
D:k\geq 9\\
\sqrt{k-9}-\sqrt k=-1\\
\sqrt{k-9}=-1+\sqrt k\\
k-9=(-1+\sqrt k)^2\\
k-9=1-2\sqrt k+k\\
2\sqrt k=10\\
\sqrt k =5\\
k=25

$

7 0

2 years ago

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

4 0

2 years ago

Bob has some 10 ltb weights and some 3 lb weights. Together, all his weights add up to 50 lbs. If x represents the number of 3 l

____ [38]

total weight = 50

3x + 10y = 50

7 0

3 years ago

5x + 7 < -3 or 3x - 4 > 11

rodikova [14]

Answer:

x < -2; x > 5

Step-by-step explanation:

5x + 7 < - 3 3x - 4 > 11

-7 -7 +4 +4

5x < - 10 3x > 15

/ 5 /5 /3 /3

x < -2 x > 5

7 0

3 years ago

Is y = 2x Linear or non-linear and why?

pshichka [43]

Answer:it is linear because every time x increases 1, y increases by 2.

Step-by-step explanation:it is a linear relationship and it is changing at a constant rate

3 0

2 years ago