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KIM [24]
3 years ago
14

6. Simplify the following a) - 36 12y b) 24a (-3a) c) 2a (-3) - 5ab d) 70y + 10 +34y - 8 7 Simplify​

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
3 0

Answer:

a) 432y

b) -72a^2

c) -6a - 5ab

d) 104y-46

Step-by-step explanation:

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3c+2d=-24 and 2c+5d= -38
Assoli18 [71]

Answer:

c=-4, d=-6

Step-by-step explanation:

3 0
2 years ago
In a doctor's waiting room, there are 14 seats in a row. Eight people are waiting to be seated. There is someone with a very bad
diamong [38]

Answer: 12,972,960

Step-by-step explanation: There are 14 chairs and  8 people to be seated. But among the 8. three will be seated together:

So 5 people and (3) could be considered as 6 entities:

Since the order matters, we have to use permutation:

¹⁴P₆ = (14!)/(14-6)! = 2,162,160, But the family composed of 3 people can permute among them in 3! ways or 6 ways. So the total number of permutation will be ¹⁴P₆  x 3! 

2,162,160 x 6 = 12,972,960 ways.

Another way to solve this problem is as follow:

5 + (3) people are considered (for the time being) as 6 entities:

The 1st has a choice among 14 ways

The 2nd has a choice among 13 ways

The 3rd has a choice among 12 ways

The 4th has a choice among 11 ways

The 5th has a choice among 10 ways

The 6th has a choice among 9ways

So far there are 14x13x12x11x10x9 = 2,162,160 ways

But the 3 (that formed one group) could seat among themselves in 3!

or 6 ways:

Total number of permutation = 2,162,160 x 6 = 12,972,960

5 0
3 years ago
What temperature is ten degrees higher than -7c
Kipish [7]

+3°C

an increase in temperature is denoted by +

- 7 + 10 = +3C

8 0
3 years ago
Read 2 more answers
The sum of two numbers is 12 and their difference is 18 what are the two numbers
lawyer [7]

Answer:


Step-by-step explanation:

x+y=12

x-y=18

Now eliminate the y by adding the two equations together to get

2x=30

x=15

then solve for y.

15+y=12

15-y=18

y= -3

3 0
3 years ago
What is the Value of “X”<br><br><br> Type answer -
NARA [144]

Answer: 96º

Step-by-step explanation:

the added angles of a triangle will be 180º

brainliest if its right?

7 0
3 years ago
Read 2 more answers
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