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1 year ago

Solve 4.62 + (−12.3). 56.83 5.85 −7.68 −16.92

Mathematics

1 answer:

ikadub [295]1 year ago

4 0

The sum of the given decimal numbers is -7.68

<h3>Sum of decimal numbers</h3>

Decimal numbers are numbers that contains decimal points. Given the expression below;

4.62 + (−12.3).

Convert to fraction to have:

4.62 + (−12.3) = 462/100 - 123/10

Find the LCM

4.62 + (−12.3) = 462-1230/100

4.62 + (−12.3) = -768/100

4.62 + (−12.3) =-7.68

Hence the sum of the given decimal numbers is -7.68

Learn more on sum of numbers here; brainly.com/question/25734188

#SPJ1

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a motorboat travels 305km in 5 hours going upstream and 651km in 7 hours going downstream. What is the rate of the boat in still

Ghella [55]

Recall your d = rt, distance = rate * time.

b = speed rate of the boat.

c = speed rate of the current.

keeping in mind that, as the boat goes Upstream, against the current, it's speed is not "b", but is really " b - c ", because the current is subtracting speed from it.

likewise, when the boat is going Downstream, because is going with the current, is really going faster at " b + c ".

$\bf \begin{array}{lccclll}
&\stackrel{km}{distance}&\stackrel{kmh}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
Upstream&305&b-c&5\\
Downstream&651&b+c&7
\end{array}
\\\\\\
\begin{cases}
305=(b-c)(5)\implies 61=b-c\implies 61+c=\boxed{b}\\
651=(b+c)(7)\implies 93=b+c\\
----------------------\\
93=\boxed{61+c}+c
\end{cases}
\\\\\\
93=61+2c\implies 32=2c\implies \cfrac{32}{2}=c\implies 16=c$

what is the speed of the boat? well, 61 + c = b.

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4 years ago

Bianka has a credit line of $8,000. She had a previous balance of $567.91 and made a payment of

Artyom0805 [142]

Answer: $\$ 6371.12$

Step-by-step explanation:

We have the following data:

Bianka's credit line = $8,000

Bianka's previous balance = $567.91

Payments = $1,200

Total purchases = $986.79

Finance charge = $10.00

Well, firstly we have to find Bianka's current balance, which is her previous balance minus all her payments, purchases and charges:

Bianka's current balance = Bianka's previous balance - (Payments + Total purchases + Finance charge)

Bianka's current balance = $567.91 - ($1,200 + $986.79 + $10.00)

Bianka's current balance = -$1628.88

Now we can find her available credit, which is her credit line with the addition of the calculated current balance:

Bianka's available credit = Bianka's credit line + Bianka's current balance

Bianka's available credit = $8,000 + (-$1628.88)

<u>Finally we have:</u>

Bianka's available credit = $6371.12

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Kruka [31]

Answer:

I believe the answer is B) All real numbers

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aleksklad [387]

Answer:

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Eduardwww [97]

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3 years ago