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3 years ago

Find the number of possible positive real zeros of 2x^4+14x^3-35x^2

1 answer:

7 0

Possible zeros: Factors of P/Factors of Q, where P is the constant and Q is the leading coefficient.

P = 35: 1, 5, 7, 35
Q = 2: 1, 2
+1, -1, +1/2, -1/2, +5, -5, +5/2, -5/2, +7, -7, +7/2, -7/2, +35, -35, + 35/2, -35/2
16 total

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2hours at 30km/h 7 hours at 65 km/h 1/2 hours at 46 km/h 45 minutes at 80 km/h 1 1/2 hours at 55km/h fors numbers 1-5, calculate

N76 [4]

Answer:

60 km

455 km

23 km

60 km

82.5 km

Step-by-step explanation:

Time = t

Speed = s

Distance is given by

$d=s\times t$

t = 2 hours

s = 30 km/h

$d=30\times 2=60\ \text{km}$

Distance driven is 60 km.

t = 7 hours

s = 65 km/h

$d=65\times 7=455\ \text{km}$

Distance driven is 455 km

t = $\dfrac{1}{2}\ \text{hours}=0.5\ \text{hours}$

s = 46 km/h

$d=46\times 0.5=23\ \text{km}$

Distance driven is 23 km

t = 45 minutes = $\dfrac{45}{60}=0.75\ \text{hours}$

s = 80 km/h

$d=80\times 0.75=60\ \text{km}$

Distance driven is 60 km

t = $1\dfrac{1}{2}\ \text{hours}=1.5\ \text{hours}$

s = 55 km/h

$d=55\times 1.5=82.5\ \text{km}$

The distance driven is 82.5 km

3 0

3 years ago

How do you solve an equation by completing the square? Example: <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%2B6x%3

Serga [27]

X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2, x₂=-4

7 0

4 years ago

Read 2 more answers

Determine the sample size required to estimate the mean score on a standardized test within 5 points of the true mean with 99% c

Elodia [21]

Given:
Accuracy = 5
99% confidence interval
s = 17, sample standard deviation.

Because the population standard deviation is unknown, we should use the Student's t distribution.
The accuracy at the 99% confidence level for estimating the true mean is
$t*( \frac{s}{ \sqrt{n} )}$
where
n = the sample size.
t* is provided by the t-table.

That is,
(17t*)/√n = 5
√n = (17t*)/5 = 3.4t*
n = 11.56(t*)²

A table of t* values versus df (degrees of freedom) is as follows.
Note that df = n-1.

n df t*
------ -------- -------
1001 1000 2.581
101 100 2.626
81 80 2.639
61 60 2.660

We should evaluate iteratively until the guessed value, n, agrees with the computed value, N.

Try n = 1001 => df = 1000.
t* = 2.581
N = 11.56*(2.581²) = 77
No agreement.

Try n = 81 => df = 80
t* = 2.639
N = 11.56*(2.639²) = 80.5
Good agreement

We conclude that n = 81.

Answer: The sample size is 81.

7 0

4 years ago

Use the remainder theorem and the factor theorem to determine whether (y − 3) is a factor of (y4 + 2y2 − 4). A. The remainder is

HACTEHA [7]

B. The remainder is 0 and, therefore, (y − 3) is a factor of (y4 + 2y2 − 4).

4 0

3 years ago

Jenny and Julie each drank a cup of hot chocolate after playing in the snow. Jenny put o more

mamaluj [8]

Answer:

6divided by 2 is equal to 4

Step-by-step explanation:

6divided by 2 equal 4

3 0

3 years ago