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Sauron [17]
3 years ago
11

There are 7 red and 4 white disks in a bag. A disc is drawn, then replaced and another is drawn. Find the probability that both

discs are the same colour
Mathematics
1 answer:
Alexandra [31]3 years ago
4 0
Is the answer 11? Sorry if I get it wrong.
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Write the equation in vertex form of the parabola with the vertex (-4,-4) that goes through the point (-2,-16)
Brrunno [24]

Answer:

- 3(x + 4) {}^{2}  - 4

Step-by-step explanation:

Vertex form is

a(x - h) {}^{2}  + k = f(x)

We know that h and k are both -4. Let x be -2 and y be -16.

a( - 2  + 4) {}^{2}   - 4 =  - 16

a(2) {}^{2}  - 4 =  - 16

4a - 4 =  - 16

4a =  - 12

a =  - 3

So the equation in vertex form is

- 3(x  + 4) {}^{2}  - 4

5 0
3 years ago
Are these lines perpendicular? yes or no?<br> y= 4x+2<br> y= (-1/4)x+12
antoniya [11.8K]

Answer: yes

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A quarterback throws a football with a velocity of 41 mph and a direction of 168°. The wind on the field is 11 mph with a direct
Cerrena [4.2K]

The true speed and direction of the football thrown by the  quarterback is 30.185 mph and 9⁰ respectively.

<h3>Relative velocity of the football</h3>

The true speed and direction of the football is determined by applying the concept of relative velocity.

Vr/w = Vb - Vw

where;

  • Vr/w is the velocity of the football with respect to the wind
  • Vb is the velocity of the football
  • Vw is the velocity of the wind

Vr/w = 41 mph - 11 mph = 30 mph

The direction speed can be determined by sketching a triangle

Direction of the speed, θ = (360 - 339) - (180 - 168)

                                       θ = 21 - 12 = 9⁰

<h3>Resultant speed;</h3>

R² = 41² + 11² - 2(41 x 11 x cos9)

R² = 911.105

R = √911.105

R = 30.185 mph

Thus, the true speed and direction of the football thrown by the  quarterback is 30.185 mph and 9⁰ respectively.

Learn more about relative velocity here: brainly.com/question/17228388

#SPJ1

8 0
2 years ago
Write an expression for "the quotient of 9 and c."
frez [133]
Quotient is when something is divided by something. therefore, an equation could be 9/c
3 0
4 years ago
State the postulate or theorem you would use to prove each pair of triangles congruent.
Diano4ka-milaya [45]

Answer:

  f) Not possible

Step-by-step explanation:

The triangles can be shown to be similar by SAS, but the corresponding sides are not marked as congruent. With the given information, it is not possible to show the triangles are congruent.

7 0
3 years ago
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