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3 years ago

If (a+b) / (x−y) = 3/5 then (10a + 10b) / (9x−9y) = ?

Mathematics

2 answers:

DerKrebs [107]3 years ago

6 0

Answer:

The answer is 2/3.

Step-by-step explanation:

Conformed by RSM.

lbvjy [14]3 years ago

5 0

Answer:

2/3

Step-by-step explanation:

Look at what you are getting on the right hand question. 10a +10b has a common factor that can be pulled out. It is 10

10a + 10b = 10(a + b)

Now look at the denominator

9x - 9y = 9(x -y)

There are a lot of possible answers.

Mine would be to multiply 3/5 * 10/9

$\dfrac{3}{5}*\dfrac{10}{9} = \dfrac{30}{45} = \dfrac{2}{3}$

(10a + 10b)/(9x - 9y) = 2/3

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There are 135 people in a sport centre. 73 people use the gym. 59 people use the swimming pool. 31 people use the track. 19 peop

Sonbull [250]

Answer:

24 people

Step-by-step explanation:

((The numbers are up there, so I am not going to define each variable.))

For starters, there is no overlap between the double facilities groups, except the triple facility users, so:

19 + 9 + 16 - 4 = 40 people

Since there is overlap between single and double groups, you will need to subtract, so:

Gym: 73 - 19 - 16 = 38

Pool: 59 - 19 - 9 = 31

Track: 31 - 9 - 16 = 6

Total for 1 facility: 38 + 31 + 6 - 4 = 71 people

((Minus 4 because the 4 triple facility users overlap the double facility users (problem is in layers: layer 1 minus layer 2, then minus layer 3).))

Next, add the totals:

71 + 40 = 111 people (using facilities)

135 - 111 = 24 people (who didn't use any)

(((I'm not 100% sure on this answer, so if someone could check my work, that would be much appreciated.)))

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3 years ago

Write a cosine function that has a midline of 3, an amplitude of 4 and a period of pi.

Artist 52 [7]

Step-by-step explanation:

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2 years ago

What is the solution to the system of equations?

yarga [219]

Answer:

(2, - 4 )

Step-by-step explanation:

Given the 2 equations

x + 2y = - 6 → (1)

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Multiplying (2) by - 2 and adding to (1) will eliminate the term in y

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Add (1) and (3) term by term to eliminate y

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Substituting into (1)

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SVETLANKA909090 [29]

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Stella [2.4K]

Answer:

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