3 years ago

How do I solve this question?

Mathematics

1 answer:

Jet001 [13]3 years ago

3 0

Answer:

n=2.5

Step-by-step explanation:

First, write an equation!

n+5n-6+2n+1=15

Now, combine like terms to make things easier.

8n-5=15

Cancel -5 from the left to isolate 5n as a variable.

8n-5+5=15+5

8n=20

Now divide both sides by 8.

8n/8=20/8

n=2.5

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What is the factorization of the polynomial below? -3x^3+15x^2+42x

kherson [118]

Factoring out x

x(-3x^2+15x+42) now factor parenthetical expression

x(-3x^2+21x-6x+42)

x(-3x(x-7)-6(x-7))

x(-3x-6)(x-7) we can factor out -3 from first parentheses

-3x(x+2)(x-7)

7 0

3 years ago

Which of the following numbers can be expressed as a decimal that terminates? 3/2, 2/3, 3/4, 5/7

Alenkasestr [34]

Answer:

3/2 and 3/4 are terminating decimals

Step-by-step explanation:

Terminating decimals are those whose decimals end.

3/2 = 1 .5

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8 0

3 years ago

Read 2 more answers

How do you solve this problem using substitution or elimination?

saw5 [17]

3x=4y
x+y=21

x = 21-y
3(21-y)=4y

63-3y=4y
63=7y
y=9

x+y=21
x+9=21
x=12

answer is (12, 9)

6 0

3 years ago

The area of a rectangle is 5/8 meter. The length of the garden is 1/5 meter. What is the width of the rectangle?

Afina-wow [57]

Width of rectangle is $Width=\frac{25}{8} meters$

Step-by-step explanation:

Area of rectangle = $\frac{5}{8}$

Length of garden = $\frac{1}{5}$

Width of rectangle = ?

Using the Formula:

Area = Length * Width

Putting values and finding width:

$\frac{5}{8}=\frac{1}{5}*Width\\ Width=\frac{5}{8}\div\frac{1}{5}\\Width=\frac{5}{8}*\frac{5}{1}\\Width=\frac{25}{8} meters$

So, width of rectangle is $Width=\frac{25}{8} meters$

Keywords: Area of rectangle

Learn more about Area of rectangle at:

#learnwithBrainly

8 0

3 years ago

Plz help me 20 points

Vera_Pavlovna [14]

that looks so hard hope you get it ! wish you the best

8 0

3 years ago