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Minchanka [31]
3 years ago
6

Solve for x and y: x+y=5 x−y=a PLEASE I NEED MY ANSWER TILL TOMORROW MORNING!

Mathematics
2 answers:
Daniel [21]3 years ago
8 0

Answer:

x=5/2 + a/2,  y= 5/2 - a/2

Step-by-step explanation:

We can solve this system using addition of the equations

x+y=5

x-y=a

2x  =(5+a)

x=(5+a)/2= 5/2 +a/2

x=5/2 +a/2

x-y=a

y = x - a , x=5/2 + a/2

y= 5/2 + a/2-a

y= 5/2 - a/2

Read more on Brainly.com - brainly.com/question/12520369#readmoreStep-by-step explanation:

KengaRu [80]3 years ago
7 0

Answer:

x=\frac{a+5}{2}  y=5-\frac{a+5}{2}  

Step-by-step explanation:

x+y=5

y=5-x

x-y=a

x-(5-x)=a

2x-5=a

2x=a+5

x=\frac{a+5}{2}  

x+y=5

\frac{a+5}{2}  +y=5

y=5-\frac{a+5}{2}  

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4 0
3 years ago
If alvin sold 60% of his baseball cards, gave away 30% of those that were left, and still had 40 baseball cards in his possessio
kipiarov [429]

Answer:

The number of baseball card to begin with is 143

Step-by-step explanation:

Let The number of baseball cards = x

The number of sold baseball card = 60% of x

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The number of left baseball card = x - 0.6 x = 0.4 x

The number of card gave away = 30 % of left cards

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Hence The number of baseball card to begin with is 143  Answer

3 0
3 years ago
Circle A has been enlarged to create circleA prime . The picture below shows the diameters of both circles.
igomit [66]

Answer:

Step-by-step explanation:

8 0
2 years ago
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Answer:

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