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barxatty [35]
3 years ago
12

5-3(2x-7)=2(7-3x)

Mathematics
1 answer:
lutik1710 [3]3 years ago
3 0

Step-by-step explanation:

Part 1: 4x + 7 = 3(2x - 5)4x+7=3(2x−5)

4x+7=6x-154x+7=6x−15

7=6x-15-4x7=6x−15−4x

7=2x-157=2x−15

7+15=2x7+15=2x

22=2x22=2x

22=2x / 222=2x/2

x=11x=11

Part 2: Sam is not correct because he messed up the second step. He added 2x on both sides to get 7x, instead he should have subtracted.

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The perimeter of a square is directly proportional to the length of one of its sides. The perimeter is 28 when the length of a s
telo118 [61]

Step-by-step explanation:

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4 0
3 years ago
Which would be the best name for a function that takes the time of day and returns the numbers of coffee sold at a coffee shop?
konstantin123 [22]

Answer:

Coffee(time)

Step-by-step explanation:

A function's output variable will be:

output(input)

So we need to find the input variable and the output variable.

We know that when the time of day changes, we get a certain amount of coffee sold. This means that the amount of coffee sold is directly influenced by the time of day.

The time of day then becomes our input as the coffee sold relies on that number.

That leaves coffee sold as our output!

So the best name for a function in this scenario is Coffee(time).

Hope this helped!

3 0
3 years ago
The sum of the ages of Mr Lin and his son Ethan is 38 years. In three years' time, Mr Lin will be three times as old as his son.
Sati [7]

Answer:

Mr.Lin's present age is 30 years now. His son is 8 years old now.

Step-by-step explanation:

Let L = Mr.Lin's present age,

   S = his son's present age.

First equation  is

L + S = 38.       (1)

The second equation is  

L + 3 = 3*(S+3)   (2)   ("In three years' time, Mr.Lin will be three times as old as his son.")

From (1), express S = 38-L and substitute it into (2). You  will get

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L + 3 = 114 - 3L + 9,

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8 0
3 years ago
PLEASE HELP. <br> if v1….
Rainbow [258]
I believe the answer is 4.4
6 0
2 years ago
What is the solution to the equation and explain your reasoning ​
Sergeu [11.5K]

Answer:

I think x = 1.5

Step-by-step explanation:

23 - 17 = 6

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5 0
3 years ago
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