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3 years ago

Which expression is equivalent to 4(3n -5)?

Mathematics

2 answers:

ra1l [238]3 years ago

8 0

Answer:

12n - 20

Step-by-step explanation:

1. 4(3n-5)

2. 4(3n-5) = 12n - 20 multiply every number in ( ) by 4 (include variables)

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aksik [14]3 years ago

4 0

Answer:

12n-20

Step-by-step explanation:

Use distribution

4×3n= 12n

4×(-5)= -20

12n-20

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Rectangle JKLM:J(-3, 8), K(-3,-1), L(4, -1),

Maslowich

Answer:

The perimeter of the Rectangle JKLM is 32 unit.

Step-by-step explanation:

Consider the provided coordinates.

Rectangle JKLM: J(-3, 8), K(-3,-1), L(4, -1), M(4,8)

First plot the points as shown in figure:

The required figure is shown below:

Now find the distance between JK by using the distance formula.

$d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$

$d=\sqrt{\left(-3-\left(-3\right)\right)^2+\left(-1-8\right)^2}=9$

Therefore, the length of JK is 9 unit.

Now find the length of the side JM

$d=\sqrt{\left(4-\left(-3\right)\right)^2+\left(8-8\right)^2}=7$

Therefore, the length of JM is 7 unit.

The perimeter of rectangle is: $P=2(l+b)$

Therefore,

$P=2(7+9)$

$P=2(16)$

$P=32$

Hence, the perimeter of the Rectangle JKLM is 32 unit.

4 0

4 years ago

The elevation of a mountain is 27,370 feet. Due to erosion, this mountain is reduced by 0.2% each year. In how many years will t

koban [17]

Answer:

7 years

Step-by-step explanation:

27370 - 26986.82 = 383.18ft

0.2% = 0.2/100 = 0.002

27370*0.002 = 54.74

each year the montain reduce your elevation

54.74ft

then:

383.18/54.74 = 7

Answer:

7 years

4 0

3 years ago

4x + y = 24 <br> 5x - y = 12<br> Applying systems of linear equations substitution, elimination.

Neko [114]

Using elimination you can eliminate 'y' to find x first.
4x=24
+ 5x=12
-------------
9x=36
9/9 x=36/9
X=4

Next use substitution to plug 4 back in to 'x'

4(4)+y=24
16+y=24
-16 -16
------------
Y=8
X is 4 and Y is 8

6 0

4 years ago

Whats another way to write 171.9%

Nastasia [14]

$p\%=\frac{p}{100}\\\\171.9\%=\frac{171.9}{100}=\frac{171.9\cdot10}{100\cdot10}=\frac{1719}{1000}=\boxed{1\frac{719}{1000}=1.719}$

3 0

3 years ago

Put these fractions in order from least to greatest. 3/12 1/6 2/3

Shtirlitz [24]

Answer:1

1/6 3/12 2/3

Step-by-step explanation:

3/12 = 2/6

2/3 = 4/6

1/6<2/6<2/3

3 0

3 years ago

Read 2 more answers