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Burka [1]
3 years ago
9

Which ordered pair is the solution?

Mathematics
2 answers:
Alex777 [14]3 years ago
8 0

Answer:

Option d.

Step-by-step explanation:

The given equation is

7x-5=4y-6

We need check which ordered pair is the solution.

Substitute x=2 and y=4 in the above equation.

7(2)-5=4(4)-6

14-5=16-6

9=10

It is a false statement because 9\neq 10.

So, (2,4) is not a solution of given equation.

Substitute x=3 and y=6 in the above equation.

7(3)-5=4(6)-6

21-5=24-6

16=18

It is a false statement because 16\neq 18.

So, (3,6) is not a solution of given equation.

Therefore, option d is correct.

Vlad [161]3 years ago
6 0

Answer:

d) neither

Step-by-step explanation:

Given equation is 7x - 5 = 4y -6 ...…...... (1)

Substitute x = 2 and y= 4 in equation (1)

 7(2) -5 = 4(4) -6

  9 ≠ 10

a) is not satisfied

Substitute x = 3 and y= 6 in equation (1)

 7(3) -5 = 4(6) -6

  16 ≠ 18

b) is not satisfied

c) is also not satisfied

<u>Final answer</u>:- neither

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So first one
'how many solutions does 2x-y=-5 and 2x+y=5 have?'
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2x+2x+y-y=5-5
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one way is to subsitute
just remember that it is in (x,y) form so
the pont (1,2) means that 1 solution is x=1 and y=2 so subsitute and find that
the first one is the answer you are correct





just look at the graph
the solution is the intersection
it seems to be at a point that is 3 units to the right and -6 units up (6 units down)
so the solution is (3,-6)
yo are corect








subsitution
y=y
therefor
the answe ris (-4,-14) if you did the math correctly











#8 is correct

# 9 is correct




# 10 the answe ris bananas=0.40 pears=0.60


the  last one you got it wrong, remember to check your answer to the graph for commonsense
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3 years ago
A weather station in Antarctica reports that the temperature is currently -44 °C and has been rising at a constant rate of 4.5 °
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-17

Step-by-step explanation:

4.5*6=27

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2 years ago
Which expressions are equivalent to 6 (–x) 2x (–7) 2x? Check all that apply. X x 6 – 7 x 2x 2 x 3 – x 2x – 4 2x x – 1 x 1.
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Equivalent expression is the expression which is equal to the original equation but the way of representation is different. The equivalent expression of the given expression are,

x+x+6-7+x

3-x+2x-4+2x=3x-1

Given information

The given expression in the problem is,

6+(-x)+2x+(-7)+2x

<h3>Equivalent expression</h3>

Equivalent expression is the expression which is equal to the original equation but the way of representation is different.

The given equation is,

6+(-x)+2x+(-7)+2x

As the product of the negative and positive is negative. Thus solve the equation by opening the bracket.

6+(-x)+2x+(-7)+2x=6-x+2x-7+2x\\&#10;6+(-x)+2x+(-7)+2x=-x+2x+2x+6-7\\&#10;6+(-x)+2x+(-7)+2x=3x-1

Check all the option,

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x+x+6-7+x

Solve it further,

x+x+6-7+x=x+x+x+6-7\\&#10;x+x+6-7+x=3x-1\\

The result is equal to the result of the given expression. Thus the expression of the option 1 is equivalent to the expression given in the problem.

  • 2) The expression given in the option 2 is,

2x+2+x

Solve it further,

2x+2+x=2x+x+2\\2x+2+x=3x+2

The result is not equal to the result of the given expression. Thus the expression of the option 2 is not equivalent to the expression given in the problem.

  • 3) The expression given in the option 3 is,

3-x+2x-4+2x

Solve it further,

3-x+2x-4+2x=3x-1

The result is equal to the result of the given expression. Thus the expression of the option 3 is equivalent to the expression given in the problem.

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x-1

The expression of the option 4 is not equivalent to the expression given in the problem.

  • 5) The expression given in the option 4 is,

x+1

The expression of the option 5 is not equivalent to the expression given in the problem.

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x+x+6-7+x

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