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Anna007 [38]
3 years ago
12

2х + Зу = 9

Mathematics
1 answer:
umka2103 [35]3 years ago
5 0

Answer:

3

Step-by-step explanation:

Given the 2 equations

2x + 3y = 9 → (1)

- 2x + 2y = 6 → (2)

Adding the 2 equations term by term will eliminate x

(2x - 2x) + (3y + 2y) = (9 + 6), that is

5y = 15 ( divide both sides by 5 )

y = 3

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A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. If they randomly decide who
nalin [4]

Answer:

53.57%

Step-by-step explanation:

We have to calculate first the specific number of events that interest us, if at least 3 are girls, they mean that 2 are boys, therefore we must find the combinations of 3 girls of 5 and 2 boys of 3, and multiply that, so :

# of ways to succeed = 5C3 * 3C2 = 5! / (3! * (5-3)!) * 3! / (2! * (3-2)!)

 = 10 * 3 = 30

That is, there are 30 favorable cases, now we must calculate the total number of options, which would be the combination of 5 people from the group of 8.

# of random groups of 5 = 8C5 = 8! / (5! * (8-5)!) = 56

That is to say, in total there are 56 ways, the probability would be the quotient of these two numbers like this:

P (3 girls and 2 boys) = 30/56 = 0.5357

Which means that the probability is 53.57%

8 0
3 years ago
X+12=7 plz solve for x and explain
aalyn [17]

Answer:

x \:  + 12 = 7 \\  x = 7 - 12 \\ x =  - 5 \\  \\ hope \: that \: helps \: uh...

7 0
3 years ago
Read 2 more answers
What is the future amount of 12,000 invested for 5 years at 14% compounded monthly?
Triss [41]

The total amount accrued, principal plus interest, with compound interest on a principal of $12,000.00 at a rate of 14% per year compounded 12 times per year over 5 years is $24,067.32.The amount of the initial loan, or principal, is multiplied by one plus the annual interest rate raised to the number of compound periods minus one to determine compound interest.

<h3 /><h3>what is compound interest?</h3>

To begin, change R from a percentage to a decimal, using the formula:

r = R/100 r = 14/100

r = 0.14 rate per year;

Next, find A by solving

A = P(1 + r/n)nt A = 12,000.00(1 + 0.14/12)(12). (5)

A = 12,000.00(1 + 0.011666666666667)(60) (60)

A = $24,067.32

Summary: The total amount accrued, principal plus interest, with compound interest on a principal of $12,000.00 at a rate of 14% per year compounded 12 times per year over 5 years is $24,067.32.

The amount of the initial loan, or principal, is multiplied by one plus the annual interest rate raised to the number of compound periods minus one to determine compound interest. You will then be left with the loan balance plus compound interest.

To learn more about interest refer to:

brainly.com/question/2294792

#SPJ13

8 0
1 year ago
2(3/4)=5<br> 3(4×2)=1<br> 1/4+4/3
Andrej [43]

Answer:

1)

2( \frac{3}{4} )= 5 \\  \frac{3}{2}  = 5 \\ 3 = 5 \times 2 \\ 3 = 10

2)

3( 4 \times 2) = 1 \\ 3(8) = 1 \\ 24 = 1

3)

\frac{1}{4}  +  \frac{4}{3}  \\  \frac{1}{1}  +  \frac{1}{3}  \\ 1 \times 3 + 1 \times 1 \\ 3 + 1 \\ 4

3 0
2 years ago
How do you solve this
PilotLPTM [1.2K]
Since 3=30/10, (30+1)/10=31/10. 31s/10=(30+1)/5 ( we get 30 because 5*6=30) = 31/5. Multiplying both sides by 10, we get 31s=62 (since 5 is a factor of 10, we can do 10/5 =2 and multiply 2 by 31). Dividing both sides by 31, we get s =2
7 0
3 years ago
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