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yuradex [85]
3 years ago
6

Luiza João tem juntos R$123 se Luiz tivesse a mais metade da quantia que tem mais um real teria dobro de João quanto tem cada um

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
5 0

Answer:

A=25

B=98

Step-by-step explanation:

You can see it as a 2-eq system.

Call A Joao's money and B Luiz's money. The sum is $123:

A + B = 123

As the half of Luiz's money + 1 is the double of Joao's money, we could represent this as:

(B/2) + 1 = 2A [this is what the last sentence says]

We can get the A value by dividing both sides by 2:

[(B/2) + 1]/2 = 2A / 2

B/4 + 1/2 = A

Then, replacing this A value on our first equation:

B/4 + 1/2 + B = 123

B/4 + 4B/4 = 123 - 1/2

(5/4)B = 122.5

Multiplying by (4/5) [or dividing by 5/4] to eliminate this 5/4:

(5/4) B * (4/5) = 122.5(4/5)

B = 98

Then we find A:

A = B/4 + 1/2 = 24.5 + 0.5 = 25

A=25

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cluponka [151]

Answer:

The time it will take Natalie to pick the forty bushels alone is 10 hours

Step-by-step explanation:

The time it takes Kali to pick forty bushels of apples alone = 15 hours

The time it takes Kali and Natalie to pick forty bushels = 6 hours

The rate at which Kali picks bushels = 40/15 bushels per hour  = 8/3 bushels per hour  

Let x represents the rate at which Natalie picks bushels, we have;

8/3 × 6 + x × 6 = 40

x × 6 = 40 - 8/3 × 6 = 24

x = 24/6 = 4

Therefore;

The rate at which Natalie picks the bushels of apples = 4 bushels/hour

The time it will take Natalie to pick the forty bushels alone = (40 bushels)/(4 bushels/hour) = 10 hours.

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3 years ago
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AleksandrR [38]

Answer:

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when in numerical order,

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Ganezh [65]

Answer:

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Step-by-step explanation:

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Using the Distributive Property, the expression 9.78(4.3x + 5.15) simplifies to _____.
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4 years ago
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