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Anestetic [448]
3 years ago
12

Help? i really don’t understand :(((

Mathematics
1 answer:
horsena [70]3 years ago
6 0

Answer:

whats the question

Step-by-step explanation:

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Solve using the method of elimination and determine if the system has 1 solution, no solutions, or infinite solutions
Minchanka [31]

\begin{array}{rrrrr} 10x&-&18y&=&2\\ -5x&+&9y&=&-1 \end{array}~\hfill \implies ~\hfill \stackrel{\textit{second equation }\times 2}{ \begin{array}{rrrrr} 10x&-&18y&=&2\\ 2(-5x&+&9y&)=&2(-1) \end{array}} \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{rrrrr} 10x&-&18y&=&2\\ -10x&+&18y&=&-2\\\cline{1-5} 0&+&0&=&0 \end{array}\qquad \impliedby \textit{another way of saying \underline{infinite solutions}}

if we were to solve both equations for "y", we'd get

10x-18y=2\implies 10x-2=18y\implies \cfrac{10x-2}{18}=y\implies \cfrac{5}{9}x-\cfrac{1}{9}=y \\\\\\ -5x+9y=-1\implies 9y=5x-1\implies y=\cfrac{5x-1}{9}\implies y = \cfrac{5}{9}x-\cfrac{1}{9}

notice, the 1st equation is really the 2nd in disguise, since both lines are just pancaked on top of each other, every point in the lines is a solution or an intersection, and since both go to infinity, well, there you have it.

8 0
2 years ago
What is the distance between two points with coordinates at (8, 40) and (20, 5)?
Alchen [17]

Answer:

37 units

Step-by-step explanation:

The two points form a right triangle so

a²+b²=c² so

(8-20)²(x values)+(40-5)²(y values)=c² (distance) so

12²+35²=c² so

144+1225=c²

1369=c²

c=37 units

7 0
3 years ago
AYUDA!!!!!!! Pls help me answer
QveST [7]

You don't mention what's the question

5 0
2 years ago
Read 2 more answers
I JUST NEED AN ANSWER AND EXPLANATION PLEASE
irakobra [83]

Answer:

B) -3x+y=1

Step-by-step explanation:

y=mx+b

b=y-intercept=1

m=slope=3/1

y=3x+1

-3x+y=1

6 0
3 years ago
Michael drove from Orlando to Jacksonville in 3 3/5 hours. The next day he drove from Jacksonville to savannah in 5 5/6 hours. W
stiv31 [10]

The answer is 9 13/30! I hope I helped!


4 0
3 years ago
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