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Dmitry_Shevchenko [17]
3 years ago
6

Solve for x and y: x+y=c x-y=a

Mathematics
1 answer:
Lunna [17]3 years ago
4 0

Answer:

x = (c+a)/2

y = (c-a)/2

Step-by-step explanation:

x+y=c

x-y=a

Add together to eliminate y

x+y=c

x-y=a

--------------

2x = c+a

Divide by 2

2x/2 =(c+a)/2

x = (c+a)/2

Multiply the second equation by -1

-x+y =-a

Add the first equation

x+y =c

-x+y=-a

-----------------

2y = c-a

Divide by 2

2y/2= (c-a)/2

y = (c-a)/2

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Gwar [14]

Answer: welcome to brainly

Step-by-step explanation:

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5 0
3 years ago
2+2*0=2 WHY.............
Tom [10]
<h3> ♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ Following the rule of PEMDAS, you would do the multiplication first

2* 0 = 0

2 + 0 = 2

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

7 0
4 years ago
Read 2 more answers
PLEASE HELP ASAP!!!!
lina2011 [118]
<h3>Answer:</h3>

System

  • p + m = 10
  • 0.8m = 0.4·10

Solution

  • p = m = 5 — 5 lb peanuts and 5 lb mixture
<h3>Step-by-step explanation:</h3>

(a) Generally, the equations of interest are one that models the total amount of mixture, and one that models the amount of one of the constituents (or the ratio of constituents). Here, there are two constituents and we are given the desired ratio, so three different equations are possible describing the constituents of the mix.

For the total amount of mix:

... p + m = 10

For the quantity of peanuts in the mix:

... p + 0.2m = 0.6·10

For the quantity of almonds in the mix:

... 0.8m = 0.4·10

For the ratio of peanuts to almonds:

... (p +0.2m)/(0.8m) = 0.60/0.40

Any two (2) of these four (4) equations will serve as a system of equations that can be used to solve for the desired quantities. I like the third one because it is a "one-step" equation.

So, your system of equations could be ...

  • p + m = 10
  • 0.8m = 0.4·10

___

(b) Dividing the second equation by 0.8 gives

... m = 5

Using the first equation to find p, we have ...

... p + 5 = 10

... p = 5

5 lb of peanuts and 5 lb of mixture are required.

8 0
4 years ago
student measuring how gasoline prices change records the cost of gas at 10 randomly selected stations in her hometown. One week​
k0ka [10]

Answer:

We conclude that he used a paired two-sample t-test.

Step-by-step explanation:

We know that the student measuring how gasoline prices change records the cost of gas at 10 randomly selected stations in her hometown. One week​ later, she records the price again at the same 10 stations.

We conclude that he used a paired two-sample t-test.

Because at each gas station, the student measured the price of gas twice.

8 0
3 years ago
1. Simplify (3 × 22) ÷ 6 + [28 – (4)2] = ?
lisov135 [29]

<em>the answer to this question is </em><em>31</em><em> </em>

6 0
3 years ago
Read 2 more answers
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