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WITCHER [35]
3 years ago
5

rmula1" title="\left \{ {{50x-2y=230} \atop {50x-3y=170} \right." alt="\left \{ {{50x-2y=230} \atop {50x-3y=170} \right." align="absmiddle" class="latex-formula">


combination method
Mathematics
1 answer:
grin007 [14]3 years ago
5 0

Answer:

x = 7, y = 60

Step-by-step explanation:

Given the 2 equations

50x - 2y = 230 → (1)

50x - 3y = 170 → (2)

Subtract (2) from (1) term by term on both sides

y = 60

Substitute y = 60 into either of the 2 equations and evaluate for x

Substituting into (1)

50x - 2(60) = 230

50x - 120 = 230 ( add 120 to both sides )

50x = 350 ( divide both sides by 50 )

x = 7

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Find the equation of the line with m = 2 and passes through the point ( 4 , − 5 ) . Write your answer in standard form A x + B y
Rudiy27

Answer:

2x - y = 13

Step-by-step explanation:

To write the equation of a line use the formula y - y_1 = m(x-x_1).

Substitute m = 2 and (4,-5).

y --5 = 2(x-4)\\y + 5 = 2(x - 4)\\y + 5 = 2x - 8\\y = 2x -13\\-2x + y = -13\\2x - y = 13

3 0
3 years ago
BRAINLIEST <br>if -x = x -6 then x = <br>A. -6<br>B. -3<br>C. 0<br>D. 3<br>explain please​
Paul [167]

Answer:

D or 3

Step-by-step explanation:

The equation you are saying is

-x = x-6

If you move both x's to one side, you get

-2x = -6

From this, you can simplify by dividing by -2

x=3, or D.

Hope this helped!

5 0
3 years ago
Which equation represents a proportional relationship?
amm1812

Answer:

5x+2

Step-by-step explanation:

I think it is 5x+2

8 0
2 years ago
Please help ASAP..........
Ne4ueva [31]
The first step to find how many 1/4 inch segments are in 1 and 1/2 inches is to convert 1 and 1/2 into an improper fraction.
To do this, convert 1 into a fraction with the same denominator as 1/2, which is 2.
1 = 1/1
1/1 = 2/2
Now add 2/2, which is the same as 1, to 1/2.
2/2 + 1/2 = 3/2
So 1 and 1/2 = 3/2
Now multiply both the numerator and denominator by 2 so you can see how many times 1/4 goes into the fraction equivalent to 1 and 1/2.
3/2 = 6/4
1/4 goes into 6/4 6 times, since the numerator of 1 goes into the numerator of 6 6 times.

So the answer is that 6 1/4 inch segments are in 1 and 1/2 inches.
4 0
3 years ago
Read 2 more answers
Y=4x^2+14x+6 factor the polynomial
Julli [10]

Answer:

−

4 x 2 + 14 x − 6 p  -4x2+14x-6p

4 0
3 years ago
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