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Hunter-Best [27]
4 years ago
10

Carlos is half as old as Andre Andre is 15 years older than Carlos how old is Andre

Mathematics
2 answers:
Leokris [45]4 years ago
7 0

Answer:

30 years old

Step-by-step explanation:

Let the two ages be A and C.

Then C = (1/2)A, and A = C + 15.

Substitute C + 15 for A in C = (1/2)A:

C = (1/2)(C + 15), or   2C = C + 15.

Then C = 15, and A = C + 15 becomes  A = 15 + 15, or  A = 30.

kvasek [131]4 years ago
4 0

Answer:30

Step-by-step explanation:

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Jake has decided to invest in three business ventures. The total cost of investing in all three ventures is $15,000. The combine
Arte-miy333 [17]
X = first venture, y = second venture, z = third venture

x + y + z = 15,000
x + z = y + 7000
3x + 2y + 2z = 39,000
these are ur equations.....

x + y + z = 15,000
x - y + z = 7000
--------------------add
2x + 2z = 22,000

x + y + z = 15,000....multiply by -2
3x + 2y + 2z = 39,000
-------------------
-2x - 2y - 2z = - 30,000 (result of multiplying by -2)
3x + 2y + 2z = 39,000
------------------add
x = 9,000

2x + 2z = 22,000
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2z = 22000 - 18000
2z = 4000
z = 4000/2
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9000 + y + 2000 = 15,000
11,000 + y = 15,000
y = 15,000 - 11,000
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first venture (x) = 9,000 <==
second venture (y) = 4,000 <==
third venture (z) = 2,000 <==
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Given equation is 2x-5y=10.

Now we need to find 3 pairs of solutions in (x,y) form for the given equation.

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