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strojnjashka [21]
3 years ago
11

Find the solution of equations -x+5y=30 10x-5y=-75

Mathematics
1 answer:
Kipish [7]3 years ago
8 0

Answer:

The solution set would be (-5, 7)

Step-by-step explanation:

To find the solution to the system. simply add them together. This will cause y to cancel and allow you to solve for x.

-x + 5y = 30

10x - 5y = -75

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

9x = -45

x = -5

Now we can place that value into either equation and solve for y.

-x + 5y = 30

-(-5) + 5y = 30

5 + 5y = 30

5y = 35

y = 7

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I have 4 questions (please help) IM BEGGING YOU i need help! please!!!!
oksian1 [2.3K]
1) 18h = 252
You divide each side by 18, so you can get "h" alone on a side, and its value on the other side of the equation.
(18h)/18 = 252/18
h = 14 (Answer C)

2) 31d = 186.
Same Thing, you divide each side by 31, so you can get "d" alone on a side, and its value on the other side of the equation.
(31d)/31 = 186/31
d= 6 (Answer B)

3) 55c = 385
Again, same thing, You divide each side by 55, so you can get "c" alone on a side, and its value on the other side of the equation.
(55c)/55 = 385/55
c = 7 (Answer B)

4) 50w = 1050
You divide each side by 50, so you can get "w" alone on a side, and its value on the other side of the equation.
(50w)/50 = 1050/50
w=21 (Answer A)

As you can notice, they all follow the same steps: dividing by the coefficient of the variable both sides, so you can the variable alone on the first side of the equation, and its value on the second side.

Hope this Helps! :)
6 0
3 years ago
Hhhhhhhhhhhhhhhhhhhhhh​
irga5000 [103]

Answer:

13 miles

Step-by-step explanation:

The shortest distance would be a straight line between the two points.  This would be a hypotenuse of a right triangle

We can use the Pythagorean theorem to determine the length

a^2+b^2=c^2

5^2 +12^2 = c^2

25+144= c^2

169 = c^2

Taking the square root of each side

sqrt(169) = sqrt(c^2)

13 = c

3 0
3 years ago
Read 2 more answers
If the Internet consisted of four computers, there would be six possible connections. If it consisted of five computers, there w
Luba_88 [7]

Answer:

<em>45 possible connections</em>

<em />

Step-by-step explanation:

The general equation for finding the possible number of connections in a network is given as

\frac{n*(n - 1)}{2}

where n is the number of computers on the network.

for 4 computers, we'll have

\frac{4*(4 - 1)}{2} = \frac{4*3}{2} = 6

for 5 computers, we'll have

\frac{5*(5 - 1)}{2} = \frac{5*4}{2} = 10.

therefore, for 10 computers, we will have

\frac{10*(10 - 1)}{2} = \frac{10*9}{2} = <em>45 possible connections</em>

3 0
3 years ago
Write the word sentence as an inequality. A number z is fewer than 3/4.
sdas [7]

Answer:

z

Step-by-step explanation:

5 0
3 years ago
Pls show me proof, thank you
Karo-lina-s [1.5K]

The y has to be negative but the x positive. So that leaves only (3,-4)

4 0
3 years ago
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