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Ludmilka [50]
4 years ago
7

15x + 31y = -3 X= -y +3

Mathematics
1 answer:
Pavlova-9 [17]4 years ago
3 0

Step-by-step explanation:

x+y=3

x=3-y

15 (3-y)+31y =-3

45-y+31y=-3

-y+31y =-3-45

30y÷30=-48÷30

y=-1,6

x+y=3

x+-1,6=3

x-1,6=3

x=3+1,6

x=4,6

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3.152 repeating into a improper fraction
LenaWriter [7]

3  19/125

You can take any number, such as 3.152, and write a 1 as the denominator to make it a fraction and keep the same value, like this:

3.152 / 1

To get rid of the decimal point in the numerator, we count the numbers after the decimal in 3.152, and multiply the numerator and denominator by 10 if it is 1 number, 100 if it is 2 numbers, 1000 if it is 3 numbers, and so on.

Therefore, in this case we multiply the numerator and denominator by 1000 to get the following fraction:

3152 / 1000

Then, we need to divide the numerator and denominator by the greatest common divisor (GCD) to simplify the fraction.

The GCD of 3152 and 1000 is 8. When we divide the numerator and denominator by 8, we get the following:

394 / 125

Therefore, 3.152 as a fraction is as follows:

394 / 125

7 0
3 years ago
Based on your understanding of sound waves,
Olin [163]

Answer:

The frequency increases as the pitch increases, and the amplitude increases as the volume increases

Step-by-step explanation:

5 0
3 years ago
what is the difference in height between an albatross flying at 100 m above the surface of the ocean and a shark swims 30 m belo
WITCHER [35]

Answer:

130 meters

Step-by-step explanation:

We have to let the "surface of the ocea" be at 0 height.

So,

anything above surface has POSITIVE height

and anything below surface has NEGATIVE height

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The shark is 30 m below, so we can say its height is:

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The difference in height is thus:

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3 0
3 years ago
PLEASE ANSWER ALL QUESTIONS SHOWN, IGNORE THE ONES THAT SAY ADD A FILE!
OLEGan [10]

Answer:

i can help with number two

Step-by-step explanation:

2- y=1/6x- 1

7 0
3 years ago
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A pair of jeans is on sale for 25% off the original price. Which expression represents the sale price? If the original price of
Sholpan [36]
25% off
so that is the original price minus 25% of the original price or p-0.25p

so we do
p-0.25p
40-0.25(40)
40-10
30


that is the first option
4 0
3 years ago
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