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adoni [48]
3 years ago
10

-x+y=5 and x-5y=-9 find x and y

Mathematics
1 answer:
erastovalidia [21]3 years ago
6 0

Answer:

x=-4 , y=1

Step-by-step explanation:

-x+y=5

x-5y=-9

Add the two equations together to eliminate x

-x+y=5

x-5y=-9

-------------------

-4y  = -4

Divide each side by -4

-4y/-4 = -4/-4

y = 1

Now we need to find x

x-5y=-9

x -5(1) = -9

x -5 =-9

Add 5 to each side

x-5+5 =-9+5

x = -4

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aksik [14]

Answer:

theres nothing here....

4 0
3 years ago
Please help me out please
icang [17]

Answer:

Your answer is <em>8.06</em>.

Step-by-step explanation:

Since you're finding the hypotenuse of the triangle through Pythagorean theorem, you need to use the formula:

a² + b² = c²

Here, you have to remember that x is the same as c in the formula. c is the hypotenuse and x.

a is going to be your smallest leg, so in this case a = 4.

b is going to be your longest leg, so it is b = 7.

Now, you don't know what c yet is so you simply write it as:

4² + 7² = c²

Do the exponents.

16 + 49 = c²

Add.

65 = c²

Now you need to get the exponent away from the c. To do that, all you have to do is square root both sides.

√65 = √c2

Once you do that, you have your answer!

<u>8.0622577483 = c</u>

Now just simplify and you're done :)

<u>8.06</u>

<u />

<u />

<u />

Might sound hard now but you'll get the hang of it.

6 0
3 years ago
A country's population in 1993 was 72 million. In 1996 it was 76 million. Estimate the population in 2003 using exponential grow
miss Akunina [59]
We use the formula for exponential growth:
P = Po exp(kt)
Using the population data from 1993 to 1996, we can solve for the growth rate k
76 = 72 exp(k(3))
76/72 = exp(3k)
ln (76/72) = 3k
k = ln(76/72) / 3 = 0.0180

In 10 years (2003), the population will be:
P = Po exp(0.0180t)
P = 72 exp(0.0180(10))
P = 86.22 million
8 0
4 years ago
Read 2 more answers
A equivalent expression to 9x-7y-6x
daser333 [38]

Answer:

3x - 7y

Step-by-step explanation:

<u>Step 1:  Combine like terms</u>

<u />9x - 7y - 6x

(9x - 6x) - 7y

3x - 7y

Answer:  3x - 7y

8 0
4 years ago
Read 2 more answers
Convert 5,400 in to miles
expeople1 [14]

I believe its 0.08522727, idk if this is correct

i'm sorry if i'm wrong

~Zane

7 0
4 years ago
Read 2 more answers
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