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neonofarm [45]
3 years ago
10

They were asked to 3 Ohigh school students in a health class to write down what they ate last week. Of the30

Mathematics
1 answer:
prohojiy [21]3 years ago
8 0

Answer:

1) P(tacos)= 10/30= 1/3

2) P(Pizzas)=18/30 =3/5

3) P(T AND P)= 5/30= 1/6

4) P(T OR P)= P(T) +P(P) - P(T AND P)

                   = 10/30 +18/30 -5/30

                  = 23/30          

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Using a directrix of y = −3 and a focus of (2, 1), what quadratic function is created?
Lelechka [254]

Answer:

  y=\dfrac{1}{8}(x-2)^2-1

Step-by-step explanation:

The distance between the focus and the directrix is the vertical distance from the point to the line:

  1 -(-3) = 4

The vertex is half that distance between the point and the line, so is at x=2 and ...

  y = (-3 +1)/2 = -1

The vertical scale factor of the quadratic is 1/(4p) where p is the distance from vertex to focus. Here, that distance is 2, so the equation in vertex form is ...

  y = (1/(4·2))(x -2)² -1

  y = (1/8)(x -2)² -1

_____

<em>Check</em>

Any point on the parabola is equidistant from the focus and directrix. This is easily checked at the vertex, which is halfway between focus and directrix, and at the points having the same y-value as the focus. Those two points are (-2, 1) and (6, 1), both of which are 4 units from the focus and 4 units from the directrix.

5 0
3 years ago
Factor the following expression. 3x^3-12x^2-2x-8
den301095 [7]
(x–4) (3x^2 + 2)

i hope that helps with you’re expression
6 0
2 years ago
Read 2 more answers
Simplify the expression please help
Mila [183]
Simplify the following:

((-1^3)/(-3)^(-3))^2

1^3 = 1:
((-1)/(-3)^(-3))^2

(-3)^(-3) = 1/(-1)^3×1/3^3 = (-1)/3^3:
((-1)/((-1)/3^3))^2

3^3 = 3×3^2:
((-1)/(-1/(3×3^2)))^2

3^2 = 9:
((-1)/((-1)/(3×9)))^2

3×9 = 27:
((-1)/((-1)/27))^2

Multiply the numerator of (-1)/((-1)/27) by the reciprocal of the denominator. (-1)/((-1)/27) = (-27)/(-1):
((-27)/(-1))^2

(-27)/(-1) = (-1)/(-1)×27 = 27:
27^2

 | 2 | 7
× | 2 | 7
1 | 8 | 9
5 | 4 | 0
7 | 2 | 9:
Answer:  729 = 1/729 thus c: is your Answer
3 0
3 years ago
Calculate the GPA of a student with the following grades: B (77 hours), D (66 hours), F (2020 hours). Note that an A is equivale
d1i1m1o1n [39]

Answer:

The student's GPA is of 0.82.

Step-by-step explanation:

GPA:

To find the student's GPA, we find his weighed mean.

Grades:

7 hours worth 3(B)

6 hours worth 1(D)

20 hours worth 0(F). So

M = \frac{7*3 + 6*1 + 20*0}{7+6+20} = 0.82

The student's GPA is of 0.82.

8 0
3 years ago
You give up a full-time salary of $45,000 a year to go to school for 2 years. The total cost of going to school is $30,000. If y
Sloan [31]
I say that answer would be C:

2 years of lost wages 
(45K+45K) = 90K 
TOTAL cost of school = 30K 

sum of investment 
(90K+30K) = 120K 

5 years to recover investment 
(120K/5yrs) = 24K per year 

Salary plus amount required to recover investment 
<span>(24K+45K) = 69K


I hope my answer has come to your help. God bless and have a nice day ahead!</span>
5 0
3 years ago
Read 2 more answers
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