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vladimir1956 [14]
2 years ago
10

Plz help me with this 4th one

Mathematics
2 answers:
Mice21 [21]2 years ago
3 0
The answer to this equation is n=3
tatyana61 [14]2 years ago
3 0

Answer:

n=3

Step-by-step explanation:

First, combine like terms on both sides of the equation.

4n+3n-9=2n-5n+21

7n-9=-3n+21

Add 3n to both sides of the equation.

7n-9=-3n+21

10n-9=21

Add 9 to both sides of the equation.

10n-9=21

10n=30

Divide both sides by 10.

10n=30

n=3

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Solve the absolute value inequality |x+9| > 3
Studentka2010 [4]

Answer:

x>−6,x<−12

Step-by-step explanation:

Break down the problem into these 2 equations.

x+9>3x+9>3

-(x+9)>3−(x+9)>3

Solve the 1st equation: x+9>3x+9>3.

x>-6x>−6

3 Solve the 2nd equation: -(x+9)>3−(x+9)>3.

x<-12x<−12

Collect all solutions.

x>-6,x<-12x>−6,x<−12

8 0
4 years ago
In a bag of m&amp;m's there are 5 brown 6 yellow 4 blue 3 green and 2 orange. What's the probability of getting 3 yellow m&amp;m
olasank [31]
There are 5+6+4+3+2=20 m&m's in the bag.
Calculate in how many ways you can choose 3 m&m's from 20:
_{20} C _3=\frac{20!}{3!(20-3)!}=\frac{20!}{3! \times 17!}=\frac{17! \times 18 \times 19 \times 20}{6 \times 17!}=\frac{18 \times 19 \times 20}{6}=3 \times 19 \times 20= \\&#10;=1140

There are 6 yellow m&m's.
Calculate in how many ways you can choose 3 m&m's from 6:
_6 C _3 = \frac{6!}{3!(6-3)!}=\frac{6!}{3! \times 3!}=\frac{3! \times 4 \times 5 \times 6}{3! \times 6}=\frac{4 \times 5 \times 6}{6}=4 \times 5=20

The probability is the number of ways of choosing 3 m&m's from 6 m&m's divided by the number of ways of choosing 3 m&m's from 20 m&m's.
P=&#10;\frac{20}{1140}=\frac{20 \div 20}{1140 \div 20}=\frac{1}{57}

The probability is 1/57.
4 0
3 years ago
Find the least common denominator (LCD) of<br> 8/9 and 1/3
jek_recluse [69]

Answer:

9

Multiples of 3: 3,6,9,12

Multiples of 9: 9, 18, 27

The smallest of the multiples is 9

Step-by-step explanation:

3 0
4 years ago
PLEASE SOLVE THIS FOR ME ITS DUE TOMORROW <br><br>Find an expression for the missing dimension.
denis-greek [22]

Answer:

The missing length is 2x+5

Step-by-step explanation:

Given equation of volume of cuboid is V= 2x^{3} +17x^{2} +46x+40

Figure show that

Length of cuboid is ?

Width of cuboid is (x+4)

Height of cuboid is (x+2)

The volume of cuboid is given by

V=Length x Width x Height

Let Length be (bx+a)

The volume of cuboid will be

V=(bx+a)(x+4)(x+2)

V=(bx+a)[x^{2}+4x+2x+8 ]

V=bx[x^{2}+6x+8]+a[x^{2}+6x+8]

V=[bx^{3}+6bx^{2}+8bx]+[ax^{2}+6ax+8a]

V=[bx^{3}+(6b+a)x^{2}+(8b+6a)x+8a]

On comparing coefficient with given equation of volume

We get,

b=2 and 8a=40

Therefore, the value of a is 5 and b is 2

Thus, The missing length is bx+a=2x+5

7 0
4 years ago
WHOEVER ANSWERS BOTH GETS BRAINLIEST AND POINTS , pls help and no links!!<br>​
zepelin [54]

Answer:

See below for answers and explanations

Step-by-step explanation:

1) Substitute d=100 into the equation and solve for s:

s=sqrt(9.81d)

s=sqrt(9.81(100))

s=sqrt(981)

s≈31.32

Therefore, the speed of the wave will be about 31.3 m/s

2) Substitute d=1000 into the equation and solve for s:

s=sqrt(9.81d)

s=sqrt(9.81(1000))

s=sqrt(9810)

s≈99.05

Therefore, the speed of the wave will be about 99 m/s

7 0
3 years ago
Read 2 more answers
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