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Lady bird [3.3K]
2 years ago
5

Are simplified ratios written in units?

Mathematics
1 answer:
sweet-ann [11.9K]2 years ago
8 0

Answer:

No

Step-by-step explanation:

Simplified ratios are not written in units.

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The ratio of boys to girls in a class is 2:3. If there are 18 girls in the class, what is the probability of a boy being in the
lukranit [14]

Answer:

0.4

Step-by-step explanation:

If the ratio of boys to girls in a class is 2:3, then

  • there are 2x boys;
  • there are 3x girls.

If there are 18 girls in the class, then

3x=18\\ \\x=6

Thus, there are

  • 2\cdot 6=12 boys;
  • 3\cdot 6=18 girls;
  • 12+18=30 students in total.

The probability of a boy being in the class is

P=\dfrac{12}{30}=\dfrac{2}{5}=0.4

7 0
3 years ago
Which point of intersection is the solution to the system that of equations y= 2/5x-1/2 and y=-1/3x+2/3
Mrrafil [7]

Answer:

x = 35/22

y = 3/22

Step-by-step explanation:

y= 2/5x-1/2 ................(1)

y=-1/3x+2/3 ...............(2)

10*(1)

10y = 4x -5 ...................(1A)

3*(2)

3y = -x +2  ....................(2A)

To find intersection, solve for y & x

4(2A) + (1A)

12y+10y = -4x+4x +8-5

22y = 3

y = 3/22

Substitute in (1)

3/22 = 2/5x -1/2

multiply by 110

15 = 44x - 55

70 = 44x

x = 70/44 = 35/22

5 0
3 years ago
Jacob wants to know how many students in his school enjoy watching space travel programs on TV. He poses this question to all 20
Naddik [55]
No because he has not went to other classes
4 0
3 years ago
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The pythagorean theorem is true for some right triangles but not all
horrorfan [7]
The pythagorean theorem works for all right triangles. Just make sure it IS a right triangle.
8 0
3 years ago
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If I could get some help it would be very much appreciated
raketka [301]

Answer:

Step-by-step explanation:

A circle is 360 degrees. What we are asked in words is, "How many degrees is 40% of 360?" Let x be "how many degrees"; the word "is" means =; 40% as a decimal is .4; the word of in this context means to multiply; and 360 is just 360. Putting all that together into an equation we can solve for x:

x = .4(360) so

x = 144

Adventure movies covers 144 degrees of that circle.

5 0
3 years ago
Read 2 more answers
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