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Lady_Fox [76]
3 years ago
5

1. 8 - n = -4

Mathematics
1 answer:
iogann1982 [59]3 years ago
4 0

Answer:

1.-n=-12; n=12

2.18=-2x; x=-9

3.-n=-12; n=12

4.b=3


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Suppose you are running a racing tournament with 12 horses. All eligible horses run in the race at once, and after the first rac
borishaifa [10]

Answer:

a)  66

b)  45

Step-by-step explanation:

We have 12 horses and after the first race 2 of them have to be eliminated

that condition is equal to consider that 10 horses will be available for the second race.

The number of possiblities we have for the first race is the combination of 12 horses in group of 10

C¹²₁₀   =  12!/ (2!)* (12-2)!   =  12*11/2   = 66

For the second race

C¹⁰₈  = 10! / 8! * (10-8)!   =   10*9/ 2   = 45

4 0
3 years ago
In a bag of marbles ½ are red, ¼ are blue, ⅙ are green, and 1/12 are yellow. You pick a marble without looking The marble is mos
ohaa [14]
It has to be red since there are the most red marbles in the bag
6 0
3 years ago
In the diagram below, ABC - DEC. What is the value of x?<br> A 5<br> B. 3<br> C. 6<br> D. 4<br>​
Anastaziya [24]

Answer:

C

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{BC}{EC} = \frac{AC}{DC}, substituting values

\frac{21}{7} = \frac{24-x}{x} ( cross- multiply )

21x = 7(24 - x) ← distribute

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x = 6 → C

7 0
3 years ago
The length of the rectangle is 1/4th the width of the rectangle. The perimeter is 35 ft. How long is the length and width?
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---- x ----
|            | 0.25x
---- x ----


x + x + 0.25x + 0.25x = 35
2.5x = 35
x = 35/2.5
x = 14
width is 14

length is 1/4 this.
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6 0
3 years ago
Read 2 more answers
Suppose the 13 inch is aware cost $.78 at the same rate how much (in cents) will 33 inches of wire cost
miskamm [114]
When comparing to thing with same rate, set up a proportion:
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13/.78=33/x
(13)(x)=(.78)(33) [cross multiplied]
13x=25.74 [simplified]
13/13x=25.74/13 [division property]
x=1.98

33 inches of wire will cost $1.98.
3 0
3 years ago
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