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marusya05 [52]
3 years ago
7

A researcher wishes to examine the influence of employment status (no job, part time, and full time) and academic class (Freshma

n, Sophomore, Junior, and Senior) on GPA. How many treatments are possible in this experiment?A- 3B- 7C- 12D- 2
Mathematics
1 answer:
guajiro [1.7K]3 years ago
6 0

Answer: C- 12

Step-by-step explanation:

Given : A researcher wishes to examine the influence of employment status (no job, part time, and full time) and academic class (Freshman, Sophomore, Junior, and Senior) on GPA.

Factor 1 = employment status

Factor 2 =  academic class

Choices for Factor 1 = 3

Choices for Factor 2 = 4

i.e. Number of treatments are possible in this experiment = (Choices for Factor 1) x (Choices for Factor 2)  = 3 x 4 = 12   (Multiplication rule )

Hence, there are 12  treatments are possible in this experiment.

Thus , the correct answer is C- 12.

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Find all the zeros of 2x4+x3-14x2-19x-6 two of its zeros are -2 and -1
GalinKa [24]

Answer:

-2,\ -1,\ -\dfrac{1}{2},\ 3.

Step-by-step explanation:

Consider polynomial 2x^4+x^3-14x^2-19x-6.

If x=-2 is its zero, then you can divide the polynomial 2x^4+x^3-14x^2-19x-6 by x+2 and get

2x^4+x^3-14x^2-19x-6=(x+2)(2x^3-3x^2-8x-3).

If x=-1, then the polynomial 2x^4+x^3-14x^2-19x-6 can be rewritten as

2x^4+x^3-14x^2-19x-6=(x+2)(x+1)(2x^2-5x-3).

The quadratic polynomial has roots

x_{1,2}=\dfrac{-(-5)\pm\sqrt{(-5)^2-4\cdot2\cdot(-3)}}{2\cdot 2}=\dfrac{5\pm \sqrt{25+24}}{4}=\dfrac{5\pm \sqrt{49}}{4}=3,-\dfrac{1}{2}.

Then the polynomial 2x^4+x^3-14x^2-19x-6 has zeros -2,\ -1,\ -\dfrac{1}{2},\ 3.



7 0
3 years ago
Identify the series 2 + 5 + 8 + 11 + 14 + . . . as arithmetic, geometric or neither.
rusak2 [61]
2, 5, 8, 11, 14 is an arithmetic sequence

a_1=2;\ d=3;\ a_n=2+(n-1)\cdot3=2+3n-3=3n-1
4 0
3 years ago
Read 2 more answers
Lines f and g are perpendicular. If the slope of line f is 4, what is the slope of line g?
pickupchik [31]
Sfgdsgfdsgfsgsdfgsdf
6 0
3 years ago
9. A cup of tea costs x pence. Coffee costs 20 pence more. Hermes buys 2 cups of tea and one cup of coffee. In total Hermes pays
qaws [65]

Answer:

  • £1.20

Step-by-step explanation:

<u>Given:</u>

  • Tea = x
  • Coffee = x + 0.2

<u>Comparing the total cost, work out the value of x:</u>

  • 2x + x + 0.2 = 3.80
  • 3x = 3.60
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5 0
2 years ago
Write your numbet ad a mixed numbet in simplest form​
Alex_Xolod [135]

Answer:

the answer is 2\frac{5}{12} hours

Step-by-step explanation:

so first we have to turn the fractions into mixed fractions, in order to do that we multiply the whole number by the denominator and add the numerator, our answer becomes the new numerator over the same denominator.

3\frac{3}{4}

3 x 4 + 3

12 + 3

15

\frac{15}{4}

we do the same thing again.

1\frac{1}{3}

1 x 3 + 1

3 + 1

4

\frac{4}{3}

then after we get our mixed fractions we subtract them from each other. Since the denominators are not the same we multiply to get the same denominators.

\frac{15}{4}-\frac{4}{3}

\frac{15*3}{4*3}-\frac{4*4}{3*4}

\frac{45}{12}-\frac{16}{12}

we subtract the numerators and keep the denominators.

\frac{29}{12}

then we simplify.

2\frac{5}{12}

6 0
3 years ago
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