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kompoz [17]
3 years ago
5

Which of the following is equivalent to -21(6 - 71)?

Mathematics
1 answer:
Wittaler [7]3 years ago
8 0

Answer: D

Step-by-step explanation:

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Help me in math please
dsp73
Answer: Choice A

Proof:
Replace x with 1 and y with 2. This is because (x,y) = (1,2) so x = 1 and y = 2.

Doing both replacements and simplifying leads to...

2*x - y = 0
2*1 - 2 = 0
2 - 2 = 0
0 = 0

That confirms (x,y) = (1,2) is a point on the line.
It confirms (1,2) is a solution to the equation.
4 0
3 years ago
at the pet fair, Darlene's dog weighed 5 times as much as leah's dog. Together, the dogs weighed 84 pounds. how much did each do
Alex
Let x = Darlene's dog's weightlet y = Leah's dog's weight x = 5yx + y = 84 so, 5y + y = 84, which means 6y = 84   so, y = 84/6 = 14x = 5(14) = 70    Darlene's dog = 70 lbs, Leah's dog = 14 lbs.<span> </span>
4 0
3 years ago
How can you distinguish if the solution is one value, all real numbers, or no solutions?
murzikaleks [220]

Answer:

If x can only have one answer, then the solution is one value. If x can be all real numbers, then the solution is all real numbers. And if x doesn't have an answer then it has no solution.

Step-by-step explanation:

For example:

One value: 7 + x= 10 => x= 3

All real numbers: 0x=0 => x can be all real numbers

No solutions: 7x=6x => no solutions

8 0
3 years ago
If a number is doubled, and 16 is added to it, the result is 40. What is the number?
Nonamiya [84]

Answer:

8

Step-by-step explanatio

7 0
3 years ago
Read 2 more answers
The factory workers make 756 machine parts in 36 hours.Suppose the workers make the same numbers of machine parts each hour..How
marusya05 [52]
They make 21 machine parts each hour because 756/36=21
3 0
3 years ago
Read 2 more answers
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