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svp [43]
3 years ago
5

The product of n, r and 21

Mathematics
1 answer:
Zinaida [17]3 years ago
7 0
I font understand wat ur asking
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Solve the system of equations using the substitution method.
ANTONII [103]

The solution of system of equations is: x = 1.6 and y = 1.2

Step-by-step explanation:

Given equations are:

y = 2-\frac{1}{2}x\ \ \ \ Eqn\ 1\\x-3y = -2\ \ \ eqn\ 2

Putting y = 2-\frac{1}{2}x in equation 2

x - 3(2-\frac{1}{2}x) = -2\\x - 6 + \frac{3}{2}x = -2\\x +\frac{3}{2}x = -2+6\\\frac{2x+3x}{2} = 4\\\frac{5x}{2} = 4\\5x = 4 * 2\\5x = 8\\x = \frac{8}{5}\\x = 1.6

Putting x = 1.6 in equation 2

1.6-3y = -2\\-3y = -2-1.6\\-3y =- 3.6

Dividing both sides by -3

\frac{-3y}{-3} = \frac{-3.6}{-3}\\y = 1.2

Hence,

The solution of system of equations is: x = 1.6 and y = 1.2

Keywords: Linear equations, variables

Learn more about linear equations at:

  • brainly.com/question/9045597
  • brainly.com/question/9103248

#LearnwithBrainly

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=4%20%2B%20y%20%3D%209.5" id="TexFormula1" title="4 + y = 9.5" alt="4 + y = 9.5" align="absmidd
s2008m [1.1K]

4 + y = 9.5

subtract 4 from both sides :

4 + y - 4 = 9.5 - 4

y = 5.5

8 0
3 years ago
Write a story for this graph. ( Use the outline plz)
Katyanochek1 [597]

Answer:

Jack is evil.

Step-by-step explanation:

Jack wasn't very smart, one-day jack made a science experiment to increase the temperature of frogs 2 fold every week starting from 2 degrees Celcius, the graph shows how much he cooked the poor frog in the weeks that sadly, followed.

(in case you don't know fold just means multiplied by that much so 20k$ going 10 fold is 200k$)

3 0
3 years ago
What number is 264% of 25?
Evgen [1.6K]

Answer:

9.47

Step-by-step explanation:

8 0
3 years ago
Which isn't the least expensive per Oz rounded to the nearest cent 20oz for $1.79 or 2 pounds 2 Oz for $2.59
Mars2501 [29]

This problem calls for calculating the unit cost in each case and then comparing the unit costs.

$1.79

---------- = $0.09/oz

20 oz

Noting that 1 lb = 16 oz,

$2.59

---------- = $0.14

18 oz


$1.79 for 20 oz is definitely the better buy (less expensive) when compared to $2.59 for 18 oz.



7 0
3 years ago
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