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Nadusha1986 [10]
3 years ago
9

Simplify an expression 3(4x+y) + 2(3x-5y)

Mathematics
2 answers:
Gemiola [76]3 years ago
7 0

Answer:

18x-7y

Step-by-step explanation:

distribute

12x+3y+6x-10y

combine like terms

18x-7y

alexira [117]3 years ago
4 0

Answer:

18x-7y

can you also please mark me as brainliest?

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If 15 members vote to choose 4 group leaders, what is the probability that 4 candidates will be chosen for 4 positions
tekilochka [14]

Answer:

\frac{4}{60} = \frac{1}{15}

Step-by-step explanation:

8 0
1 year ago
in a five character password the first two characters must be digits and the last three characters must be letters if no charact
Vilka [71]

Answer:

1,404,000 unique passwords are possible.

Step-by-step explanation:

The order in which the letters and the digits are is important(AB is a different password than BA), which means that the permutations formula is used to solve this question.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

P_{(n,x)} = \frac{n!}{(n-x)!}

In this question:

2 digits from a set of 10(there are 10 possible digits, 0-9).

3 characters from a set of 26. So

P_{10,2}P_{26,3} = \frac{10!}{8!} \times \frac{26!}{23!} = 10*9*26*25*24 = 1404000

1,404,000 unique passwords are possible.

5 0
3 years ago
Problem :
notsponge [240]
400 - 2 x Age = 244
-2*Age = -156
Age = 78 years
3 0
3 years ago
Read 2 more answers
In a particular lottery, 5 winning numbers are drawn from a set of 37 numbers. What is the probability of picking exactly 2 of t
anygoal [31]

Since 5 winning numbers are draw and there are exactly 2 winning numbers, the other 3 numbers chosen have to be incorrect.

The 2 numbers picked right, there are 5C2=10 different possibilities.

The other 3 numbers are just picked from the rest of the 32 numbers. Getting there are 32C3=4960 different possibilities.

For each set of 2 correct winning numbers, you could have the 4960 different losing numbers to match up to make a unique set. This meant that there are 4690*10=46900 different total possibilities.

Now the total different outcomes of how you can choose the numbers are 37C5=435897 outcomes.

Now the way to find probabilities is want/total

The want is 46900 and the total is 435897

Doing the division you get the number rounded to the nearest thousandths as   0.107 or in percent form as

10.759% chance of picking exactly 2 winning numbers.

This seems like a competition problem of some sort therefore I assume that you already know what combinations in form nCk and permutation in form nPk means.

8 0
2 years ago
May someone answer this plzz
Nataly_w [17]

D)

6 5/8

or 6.625

Basically

1/8*3 =0.375

1/4 * 3 =0.75

1/2*5 =2.5

and 3/4*4=3

So then,

0.375+0.75+2.5+3=6.625 or 6 5/8 in fraction!

8 0
3 years ago
Read 2 more answers
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