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Sergeeva-Olga [200]
3 years ago
13

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}

so

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

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The two lines y= 6x+15 and y= mx+4 intersect at x= -2. What is the y-coordinate of their intersection point
taurus [48]

Answer:

The y-coordinate of their intersection point is 3

That is y=3

Step-by-step explanation:

Given two lines are y=6x+15 and y=mx+4

Given that the two lines intersect at x=-2

To find the y coordinate of their intersection point :

Equating the two lines

6x+15=mx+4

6x+15-mx-4=0

6x-mx+11=0

(6-m)x+11=0

At x=-2  (6-m)x+11=0

(6-m)(-2)+11=0

(6-m)(-2)=-11

6-m=\frac{11}{2}

-m=\frac{11}{2}-6

-m=\frac{11-12}{2}

-m=\frac{-1}{2}

m=\frac{1}{2}

Substitute the value m=\frac{1}{2} in y=mx+4 we get

y=\frac{1}{2}x+4

At x=-2 y=\frac{1}{2}(-2)+4

=-1+4

=3

Therefore y=3

Therefore the y-coordinate of their intersection point is 3

7 0
3 years ago
A 7.5 force is applied to a football, causing an acceleration of 15 m/s2. Calculate the mass
faust18 [17]

Step-by-step explanation:

We know that we have the formula that F = ma

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Now

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7.5 = m * 15

m = 7.5/ 15

Mass = 0.5 kg

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Answer:

Domain: X is an element of real number

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Step-by-step explanation:

x is an element of all real numbers

y=5x has a one to one relation. It is a function

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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