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Leya [2.2K]
4 years ago
11

Solve the system of equations given below

Mathematics
1 answer:
LuckyWell [14K]4 years ago
3 0

-5(y-15=3x) = -5y+75=-15x

add 15x to both sides and subtract 75 to both sides

-5y+15x=-75

5y-2x=-3

13x=-78

divide 13 to both sides

x=-6

y-15=3(-6)

y-15=-18

add 15 to both sides

y=-3

so the answer is  (-6,-3)

I hope that this helped you sweetie :)



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Help please 15 points up for grabs
Usimov [2.4K]

a) P(3) = \frac{11}{100} (or 0.11 or 11%)

b) Number of sixes = P(6) x 500

                                = \frac{12}{100} x 500

                                = 12 x 5

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5 0
3 years ago
the sum of Ages of two brother is 18the elder brother is 10 years older than younger brother then what are the ages of those bro
NemiM [27]

Answer:

Age of younger brother is 4 years..

And age if elder brother is 14 years.

Step-by-step explanation:

Let us denote 'x' as the age of smaller brother,

then, the age of younger brother will be x+10 years.

x+x+10 = 18

2x+10 = 18

2x = 18-10

2x = 8

x = 8/2

x = 4

Age of younger brother is 4 years.

Age of elder brother = x + 10

= 4 + 10

= 14 years.

4 0
3 years ago
David drove 580 km on 7 hour journey. on the city roads he drove 60km/h and on the he drove 100km/h. How long did he drive at ea
serious [3.7K]

Answer:

3 hours on the city roads and 4 hours on the other roads

Step-by-step explanation:

580 (total miles driven) - 400 (4 hours of driving 100km/h) = 180 (miles left)

180 (miles left to drive) / 60 (km/h) = 3 (hours driven at the speed of 60km/h)

I hope this helps :)

5 0
3 years ago
How to solve 32-2(23-16)+4*4*3
scoundrel [369]

Answer:

66

Step-by-step explanation:

Order of operations:

32-2(7)+4*4*3

32-14+48

66

4 0
3 years ago
Read 2 more answers
A train travels 190 km in 3.0 hours and then 120 km in 2.0 hours. What is its average speed?
melisa1 [442]
The average speed it 310
3 0
3 years ago
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