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Thepotemich [5.8K]
3 years ago
12

I am very confused, if somebody could help me it would mean alot. :)

Mathematics
1 answer:
Yuliya22 [10]3 years ago
8 0

Answer:

3n+7=16

Step-by-step explanation:

3(3)+7=16

9+7=16

16=16

The second one is wrong(x=18)

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A metal worker has several 1-kilogram bars of a metal alloy that contain 23% copper and several 1-kilogram bars that contain 79%
astraxan [27]

Answer:

30 each of 23% bars and 18 each of 79% bars

Step-by-step explanation:

If x is the number of 1 kg 23% copper bars, and y is the number of 1 kg 79% copper bars, then:

x + y = 48

0.23x + 0.79y = 0.44(48)

Substituting and solving:

0.23x + 0.79(48-x) = 0.44(48)

0.23x + 37.92 - 0.79x = 21.12

16.8 = 0.56x

x = 30

y = 48 - x

y = 18

You need 30 each of 23% bars and 18 each of 79% bars.

4 0
3 years ago
Write the equation 5x − 2y = 10 in the form y = mx + b. y equals start fraction five over two end fraction x minus 10 y equals s
vaieri [72.5K]

Answer:

y = 5/2x - 5

Step-by-step explanation:

You have to rearrange the equation so that it is equal to y.

5x - 2y = 10

(5x - 2y) - 5x = -5x + 10

-2y = -5x + 10

(-2y)/-2 = (-5x)/-2 + (10)/-2

y = 5/2x - 5

6 0
2 years ago
Mort is trying to save money to get out of student debt he saves money each month from his paycheck the function below relates m
Savatey [412]

Answer:

hello your answer is 21  y=21

Step-by-step explanation:

3 times -7 is 21- hope i helped

7 0
3 years ago
If P is the midpoint of XY, XP = 8x - 2 and PY = 12x - 30, find the<br> value of x.
Arlecino [84]

Answer:

x=7

Step-by-step explanation:

<u>If P is the midpoint of XY, then XP = PY:</u>

  • 8x - 2 = 12x - 30
  • 12x -8x = 30 -2
  • 4x = 28
  • x= 28/4
  • x= 7
3 0
2 years ago
What's 3570 divided by 7​
mart [117]

Answer:

510

Step-by-step explanation:

\frac{3570}{7} = 510

7 0
3 years ago
Read 2 more answers
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