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3 years ago

Which phrase describes an unknown or changeable quantity/

1 answer:

6 0

Answer:
C. 2 times the number of pages in the book

Explanation:
The number of pages of the book may vary or can change depending on the book

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Pls help I don't understand what is x→7 x+2-3x-7

valkas [14]

Answer:

Step-by-step explanation:

7x+2-3x-7 I believe this is impossible because ther will be no equal sign so please enter it again or?

5 0

1 year ago

Three apple pies, all the following shape, are left on a counter. How much total pie has been left?

faltersainse [42]

1 pie is the total pieeeeeeeeeee

6 0

2 years ago

The equation P= 21 + 2w models the perimeter, P, of a rectangle with a length of / units and a width of w units.

natima [27]

Answer:

width = 10 units and length = 20 units

Step-by-step explanation:

Let the width be w

so Length will be 2w

using the rectangle formula:

$\sf Perimeter \ of \ rectangle= 2L + 2W$

$\sf 60= 2(2w) + 2w$

$\sf 60= 4w + 2w$

$\sf 60= 6w$

$\sf w = 10 \ units$

Find length:

$\sf length = 2w$

$\sf length = 2(10)$

$\sf length = 20 \ units$

5 0

2 years ago

Read 2 more answers

13. For the arithmetic sequence: 6, 12, 18, 24,...

serg [7]

a_15 = 90

a_n = 6n

Step-by-step explanation:

Given sequence is:

6, 12, 18, 24,...

First of all we have to find the common difference. The common difference is the difference between consecutive terms of an arithmetic sequence.

Here,

$d=a_2-a_1 = 12-6 = 6\\d=a_3-a_2= 18-12 = 6$

The general form for arithmetic sequence is:

$a_n=a_1+(n-1)d$

Putting the values for a_1 and d

$a_n=6+(n-1)(6)\\a_n=6+6n-6\\a_n=6n$

$a_{15} = 6(15)\\=90$

<u>b) Write an equation for the nth term.</u>

The equation is: a_n=6n

Keywords: Arithmetic sequence, Common Difference

Learn more about arithmetic sequence at:

#LearnwithBrainly

4 0

3 years ago

Which is a correct first step for solving this equation? X+7=2x+5-4x

shepuryov [24]

Step-by-step explanation:

you collect like terms from both sides that is, the variables on one side and the constants on the other side

8 0

3 years ago

Read 2 more answers