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DerKrebs [107]
2 years ago
13

What is the discriminant of 3x squared -10x= -2

Mathematics
1 answer:
artcher [175]2 years ago
3 0
The discriminant of the equation 3 x^{2} -10x=-2 is 76.
I hope that helps.
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A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past
Volgvan

Answer: We reject the null hypothesis, and we use Normal distribution for the test.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis : H_0:\mu\geq 50000

Alternate hypothesis : H_1:\mu

There  is 5% level of significance.

\bar{X}=46800\\\\\sigma=9800\\\\n=29

So, the test statistic would be

z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{46800-50000}{\dfrac{9800}{\sqrt{29}}}\\\\z=-1.75

Since alternate hypothesis is left tailed test.

So, p-value = P(z≤-2.31)=0.0401

And the P-value =0.0401 is less than the given level of significance i.e. 5% 0.05.

So, we reject the null hypothesis, and we use Normal distribution for the test.

4 0
3 years ago
Which expression is equivalent to (x^4/3 x^2/3)^1/3
Oksanka [162]

Answer:

X^2/3

Step-by-step explanation:

6 0
2 years ago
need help asap plzz.Solve the inequality. (x + 19 ≤ −5). (A)x ≤ −14 (B)x ≤ 24 (C)x ≤ −24 (D)x ≤ 14
Sindrei [870]

Answer:

C

Step-by-step explanation:

given

x + 19 ≤ - 5 ( isolate x by subtracting 19 from both sides )

x ≤ - 24 →  C

3 0
3 years ago
What is u = kx + ух, for x
Ivahew [28]

Answer:

<h2>x=  \frac{u}{k + y}</h2>

Step-by-step explanation:

u = kx + ух

First of all factorize x out at the right side of the equation

That's

u = x(k + y)

Divide both sides by ( k + y) to make x stand alone

That's

<h3>\frac{x(k + y)}{k + y}  =  \frac{u}{k + y}</h3>

We have the final answer as

<h3>x =  \frac{u}{k + y}</h3>

Hope this helps you

6 0
3 years ago
Which function below represents the arithmetic sequence 3, 7, 11, 15...?
mr Goodwill [35]
D) f(n) = 3 + 4(n-1)

3 = 1st term
4 = common difference among the terms
n = term number you are looking for.

To check: 3, 7, 11, 15, ...

f(1) = 3 + 4(1-1) = 3 + 4(0) = 3 + 0 = 3
f(2) = 3 + 4(2-1) = 3 + 4(1) = 3 + 4 = 7
f(3) = 3 + 4(3-1) = 3 + 4(2) = 3 + 8 = 11
f(4) = 3 + 4(4-1) = 3 + 4(3) = 3 + 12 = 15
4 0
3 years ago
Read 2 more answers
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