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-BARSIC- [3]
3 years ago
6

3-(-4) answer the question

Mathematics
2 answers:
Jobisdone [24]3 years ago
7 0

Answer:

<h2>7</h2>

Step-by-step explanation:

3-(-4) \\-\times - = +\\3+4 \\=7

Triss [41]3 years ago
3 0

Answer:

7

Step-by-step explanation:

because you when multiply -1 by -4 u get positive 4 then 3 + 4 equals 7

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A toothpaste company mailed a survey to 360 households. In the first two weeks, the toothpaste company received 45% of the surve
trasher [3.6K]

Answer:

A)162

Step-by-step explanation:

5 0
2 years ago
Determine whether the given value is a solution of the equation x over nine=4; x=36
Citrus2011 [14]
Yes ; "x = 36" , is, in fact, a solution.
________________________________________________________
Given the equation:  "x / 9 = 4" ; 
________________________________________________________
"x = 36" is a solution ;  since "36 ÷ 9 = 4" ;  and since x = (4)*(9) = 36.
_________________________________________________________
8 0
3 years ago
Read 2 more answers
Suppose we want to choose 4 colors, without replacement, from 18 distinct colors.
amm1812

Answers:

  • (a) 73440
  • (b)  3060

=====================================================

Explanation for part (a)

Consider four slots labeled A,B,C,D.

We have

  • 18 choices for slot A
  • 17 choices for slot B
  • 16 choices for slot C
  • 15 choices for slot D

We started at 18 and counted down until we filled the four slots. The countdown is because we cannot repeat a color. Multiply out those values to get the answer: 18*17*16*15 = 73440

You can use the nPr permutation formula as an alternative method

_nP_r = \frac{n!}{(n-r)!}

in this case n = 18 and r = 4. The exclamation marks indicate factorial.

-----------------------------------

Explanation for part (b)

Let's say we had color labels A,B,C,... all the way up to R which is the 18th letter in the English alphabet. From those 18 letters, we can only pick four. Let's say we pick D,E,F,G.

Focusing solely on the set {D,E,F,G}, we only have one set and the order doesn't matter. So {D,E,F,G} is the same as {D,E,G,F}.

There are 4*3*2*1 = 24 ways to arrange those four items meaning that we'll need to divide the result of part (a) by 24 to get the result of part (b)

73440/24 = 3060

You could use the nCr combination formula to get the same result

_nC_r = \frac{n!}{r!(n-r)!}

where n = 18 and r = 4 are the same from last time.

The connection between nPr and nCr is this

_nC_r = \frac{_nP_r}{r!}

which can be rearranged into

_nP_r = r!*\left( _nC_r \right)

these formulas are handy to help us go back and forth between nCr or nPr.

8 0
2 years ago
Find the angle between vector u=i+sqrt 7 j and vector v=-i-4j to the nearest degree.
kenny6666 [7]

Answer:4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find A/// help please!! ❤️❤️
andre [41]
It’s number 12!!!!! I know it already got answered
5 0
3 years ago
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