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fgiga [73]
3 years ago
13

Need help with these questions

Mathematics
1 answer:
maria [59]3 years ago
7 0

Answer:

Step-by-step explanation:

2) When x = 6

x - 2y = 8

6 - 2y = 8

    -2y = 8 - 6

    -2y = 2

       y = 2/-2

     y = -1

Yes, (6, -1) lies on the line.

3) No, (-2 , -3) is not on the line

4) (-2 , -3) is not a solution to this equation because it does not lie on the line.

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FIND TWO NUMBERS WHOSE SUM IS 21 AND DIFFERENCE IS 17<br><br>11 , 10<br>2 ,23<br>19 ,2​
AveGali [126]

Answer:

19, 2

Step-by-step explanation:

let the 2 numbers be x and y with x > y , then

x + y = 21 → (1)

x - y = 17 → (2)

Add the 2 equations term by term to eliminate y , that is

2x = 38 ( divide both sides by 2 )

x = 19

substitute x = 19 into (1) for value of y

19 + y = 21 ( subtract 19 from both sides )

y = 2

The 2 numbers are 19 and 2

5 0
3 years ago
Suppose you answered 19 questions correctly on a test. If this is 95% of the questions, how many questions were in the test?
zzz [600]
It is 20.
1st: set up a proportion. --> 95/100=19/x
2nd: cross multiply. --> 95 times x=95x. 100 times 19=1900.
3rd: divide 1900 by 95. --> 1900÷95=20
There you go! Your answer is 20
Answer is: 20 questions in total
7 0
4 years ago
Read 2 more answers
Helppppp please I will give brainliest​
ExtremeBDS [4]

Answer:

0

Step-by-step explanation:

Y-intercept is where the line touches the y-axis, in this case it was the origin (0,0) so the y-intercept is 0

4 0
3 years ago
Change 5530mm to m and cm
katrin2010 [14]

5530 mm is 553 cm and 5.53 m.

5530 \: mm =  \frac{5530}{10}    = 553 \: cm \\ 553cm =  \frac{553}{100 }    = 5.53 \: m

3 0
3 years ago
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What is 3x-8-8x=42 answer nowwww
Ksju [112]

Answer:

x= -10

Step-by-step explanation:

6 0
3 years ago
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