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Galina-37 [17]
2 years ago
13

Please help i dont get it

Mathematics
2 answers:
natta225 [31]2 years ago
6 0

slope is rise over run so it will be 20/4 or you can reduce it to 5

horsena [70]2 years ago
4 0
I don’t get this either good luck
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Y=2/3x-3. Follow the formula y=Mx+b. M is the slope, and b is the y intercept.
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I think that its 36...

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In a competition, a school awarded medals in different categiories.40 medals in sport 25 medals in danceand 212 medals in music,
aleksley [76]

Answer:

210

Step-by-step explanation:

Given:

Medals in sports = 40

Medals in dance = 25

Medals in music = 212

Total students that received medals = 55

Total students that received medals in all three categories = 6

Required:

How many students get medals in exactly two of these categories?

Take the following:

A = set of persons who got medals in sports.

B = set of persons who got medals in dance

C = set of persons who got medals in music.

Therefore,

n(A) = 40

n(B) = 25

n(C) = 212

n(A∪B∪C)= 55

n(A∩B∩C)= 6

To find how many students get medals in exactly two of these categories, we have:

n(A∩B) + n(B∩C) + n(A∩C) −3*n(A∩B∩C)

=n(A∩B) + n(B∩C) + n(A∩C) −3*6 ……............... (1)

n(A∪B∪C)=n(A)+n(B)+n(C)−n(A∩B)−n(B∩C)−n(A∩C)+n(A∩B∩C)

Thus, n(A∩B)+n(B∩C)+n(A∩C)=n(A)+n(B)+n(C)+n(A∩B∩C)−n(A∪B∪C)

Using equation 1:

=n(A)+n(B)+n(C)+n(A∩B∩C)−n(A∪B∪C)−18

Substitute values in the equation:

= 40 + 25 + 212 + 6 − 55 − 18

= 283 - 73

= 210

Number of students that get medals in exactly two of these categories are 210

6 0
3 years ago
What is the simplified form of this expression?<br> (3 - 13x - 7x?) - (5X2 + 12x - 10)
tatiyna

Answer:

-5x^2-32x+13

Step-by-step explanation:

(3-13x-7x)-(5x^2+12x-10)

3-20x-5x^2-12x+10

-5x^2-32x+13

6 0
3 years ago
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A Formula one car travels at 850 feet every 10 seconds. If the Car is 2550 feet from the finish line, How much time will it take
Vinvika [58]

Answer:

30 seconds

Step-by-step explanation:

speed= 850 feet / 10 seconds = 85 feet/ second

distance = 2550

time= distance/speed

= 2550 divided by 85

= 30 seconds

4 0
3 years ago
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