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nekit [7.7K]
3 years ago
13

How do I find the sum of 6(-2.1k-2) + (7k+5)

Mathematics
1 answer:
baherus [9]3 years ago
8 0

Answer:

-5.6k-7

Step-by-step explanation:

you'd start by multiplying 6 by everything in the first pair of parentheses:

6(-2.1k-2)= (-12.6k-12)

then you'd add the like terms together:

(-12.6k-12)+(7k+5)= -5.6k-7

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Bezzdna [24]

Answer:

x²-9=x²-3²=(x+3)(x-3)

Step-by-step explanation:

use formula

a²-b²=(a+b)(a-b)

7 0
3 years ago
Seven blue and four red balls are to be arranged in order. How many ways can this be done if (1) The blue balls are distinguisha
Sav [38]

Answer:

1) n = 39916800

2) n = 1663200

3) n = 330

Step-by-step explanation:

1) If the blue balls are distinguishable as are the red balls

Then you can arrange these balls in the following ways, we must use a permutation

In totally we have 11 balls, then

n = 11P11

n = \frac{11!}{(11-11)!} = 11! = 39916800\\  

2) If Blue balls are distinguishable, but the red balls are identical

In this case, we need to do a correction due to the red balls are identical and we cannot identify the difference when we interchange two red balls

n = \frac{11!}{4!}  = \frac{39916800}{24} = 1663200

3) If the balls of each color are indistinguishable

We proceed equal to the before case but we include a correction due to blue balls also

n = \frac{11!}{4!*7!} = \frac{39916800}{24*5040} = 330

7 0
3 years ago
Acompany makes toy plastic soccer balls each with a radius of 3 inches. How many square inches of plastic does the
drek231 [11]

Answer:

i think it number 1 113.0 in

3 0
3 years ago
Read 2 more answers
The jewerly store is having a sale. Necklaces that were regulaey priced at $23.50 are on dale for $18.80. What is the percentage
AveGali [126]
What we need to do is find the difference between the two numbers to find the difference in price and then figure out what the percent of 23.5 that is

23.50-18.80=4.7

now we'll set up a proportion

4.7       x
----- = -----
23.5   100

then cross multiply and divide

100×4.7=470/23.5=20

the percent of decrease is 20%

I hope I've helped!
8 0
3 years ago
<img src="https://tex.z-dn.net/?f=12%20%5Cfrac%7B3%7D%7B6%7D%20%2B%2014%5Cfrac%7B4%7D%7B6%7D%20" id="TexFormula1" title="12 \fra
Vikki [24]
27 1/6 or 163/6 or 27.16
6 0
3 years ago
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