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IrinaK [193]
3 years ago
12

The ordered pair (1, -2) is a solution to the system of linear equations.

Mathematics
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

False

Step-by-step explanation:

2x + y = 0

Try (1, -2)

2(1) + (-2) = 0

2 + (-2) = 0

0 = 0

The solution works on the first equation.

-x + 2y = 5

-(1) + 2(-2) = 5

-1 - 4 = 5

-5 = 5

The solution does not work in the second equation.

Answer: False

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What is 2/3+3m/5=31/15? Please show your work! Thank You!
scZoUnD [109]

Answer:

m = \frac{7}{3}

Step-by-step explanation:

Given

\frac{2}{3} + \frac{3m}{5} = \frac{31}{15}

Multiply through by 15 to clear the fractions

15 is the lowest common multiple of 3, 5 and 15

10 + 9m = 31 ( subtract 10 from both sides )

9m = 21 ( divide both sides by 9 )

m = \frac{21}{9} = \frac{7}{3}

4 0
3 years ago
The graph below represents the distance of a dog from a trainer after a command is given.
GuDViN [60]

Answer:

.

Step-by-step explanation:

5 0
3 years ago
Needs to be in fraction form and simplified <br><br> 3 4/5 + 4 5/6 =? <br><br> 10 points
LenaWriter [7]

Answer:

259/30 or 8 19/30 depending on what format your teacher wants the answer

Step-by-step explanation:

First we can turn both mixed fractions into improper fractions and to do that we multiply the whole number by the denominator and that add that to the top number.  So for 3 4/5 we would multiply 3 and 5 and than add 4 getting us to 19/5 doing the same to 4 5/6 gets us to 29/6.  Now in order to add fractions we need to get a common denominator.  The least common multiple of 5 and 6 is 30 so we will multiply each fraction by whatever number will give us 30 in the denomiator.  for 19/5 that number is 6 so our new fraction is 114/30 and for 29/6 that number is 5 so our new number is 145/30.  Now we just add the numerators and simplify.  114/30+145/30=259/30

I hope this helps and please don't hesitate to ask if there is anything still unclear!

6 0
3 years ago
The actual height of the Gateway Arch in St. Louis is 630 feet. A scale model of the arch is 9 inches tall. Which statement(s) a
Semmy [17]

Answer:

D. The scale factor is 1:840

Step-by-step explanation:

Make 630 ft into inches, so 7560

Then make it 9/7560, which simplifies to 1/840

6 0
4 years ago
Read 2 more answers
1, 3, 7, 15, 31 next two terms in the nsequence
alexira [117]

1 + 2^1 = 3

3 + 2^2 = 7

7 + 2^3 = 15

15 + 2^4 = 31

31 + 2^5 = 63

63 + 2^6 = 127

so the next two terms in the sequence 1, 3, 7, 15, 31, is 63 and 127.


3 0
3 years ago
Read 2 more answers
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