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xz_007 [3.2K]
3 years ago
9

13. Give an example of a linear equation that is parallel to the y-axis.

Mathematics
1 answer:
zhenek [66]3 years ago
4 0

Answer:

x=1

Step-by-step explanation:

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There are 5 girls and 5 boys in a chess club. The club holds a round-robin tournament in which every player plays against every
Bess [88]
<span>1. In how many games does a girl play against a boy?
A: Because there are 5 girls, each will play against 5 boys, so in total is 5*5 = 25 times.

2. </span><span>In how many games does a girl play against another girl?
A: In this case, we only need to calculate how many girl pairs are there among these 5 girls, and it become a combination problem which can solved by </span>C^{2}_{5}=\frac{5*4}{2*1}=10

3.The fraction of games "B vs B" should be the number of "B vs B" (which is 10) divide the total number of the games "B vs B" & "G vs G" & "B vs G" (which is 10+10+25=45, see the analysis in 1.A and 2.A), so the fraction should be 10/45=2/9

4.One person will have to play against 9 people at the tournament, and the total number of the games is 45, so the fraction should be 9/45 = 1/5
7 0
3 years ago
Read 2 more answers
Help please practical math
ad-work [718]
Greetings!

The second option would be correct as the sales in January and June were both at $240,000, based of the graph. 

Hope this helps.
-Benjamin
6 0
3 years ago
26.8 as a percent what is 26.8 as a percent
nirvana33 [79]
I think it would be 2,680%
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7 0
3 years ago
Write five equivalent expressions that are equivalent to:<br> 120 + 3.6
MAVERICK [17]

Answer:

*61.8 × 2

*10.6 + 113

*247.2 divided by 2

*203.6 - 80

*111.6 + 12

3 0
3 years ago
Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha
lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = D_1 = 5 miles

Let The speed for running = S_1

The distance cover with bike = D_2 = 80 miles

The speed for biking = S_2 = 15 mph +  S_1

Total Time taken = 5 hours

Now Time = \dfrac{\textrm Distance}{\textrm Speed}

∴ 5 hour = \frac{D_1}{S_1} +  \frac{D_2}{S_2}

Or,  5 hour = \frac{5}{S_1} +  \frac{80}{15+S_1}

Or, 5 hour = \frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}

or,  5 × (S_1^{2}+15 S_1) = 85 S_1 + 75

Or, 5 S_1^{2} + 75 S_1 -  85 S_1 - 75 = 0

or, 5 S_1^{2} -10 S_1 - 75 = 0

or,   S_1^{2} -2 S_1 - 15 = 0

Or, S_1^{2} -3 S_1 + 5 S_1- 15 = 0

Or, S_1 (S_1 - 3) + 5 (S_1 - 3) = 0

Or, (S_1 - 3) ( S_1 + 5 ) = 0

∴ S_1 = 3 , - 5

So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour  .  Answer

7 0
3 years ago
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